1.Login to your blogger dashboard--> layout- -> Edit HTML

2.Scroll down to where you see]]></b:skin> tag .

3.Copy below code and paste it just beforethe ]]></b:skin> tag.

.showpageArea a {
text-decoration:underline;
}
.showpageNum a {
border:1px solid #CCCCCC;
margin:0 3px;
padding:3px 7px;
text-decoration:none;
}
.showpageNum a:hover {
background-color:#CCCCCC;
border:1px solid #CCCCCC;
}
.showpagePoint {
-moz-background-clip:border;
-moz-background-inline-policy:continuous;
-moz-background-origin:padding;
background:#CCCCCC none repeat scroll 0 0;
border:1px solid #CCCCCC;
color:#333333;
margin:0 3px;
padding:3px 7px;
text-decoration:none;
}
.showpageOf {
margin:0 3px 0 0;
padding:3px 7px;
text-decoration:none;
}
.showpage a {
border:1px solid #CCCCCC;
padding:3px 7px;
text-decoration:none;
}
.showpage a:hover {
text-decoration:none;
}
.showpageNum a:link, .showpage a:link {
color:#333333;
text-decoration:none;
}

4.Now save your template.

5.Go to Layout-->Page Elements and click on "Add a gadget".

6.Select "html/java script" and add the code given below and click save.Now drag your new gadget under "Blog Posts" Section.

<script type='text/javascript'>

var home_page_url = location.href;


var pageCount=1;
var displayPageNum=3;
var upPageWord ='Previous';
var downPageWord ='Next';


function showpageCount(json) {
var thisUrl = home_page_url;
var htmlMap = new Array();
var thisNum = 1;
var postNum=1;
var itemCount = 0;
var fFlag = 0;
var eFlag = 0;
var html= '';
var upPageHtml ='';
var downPageHtml ='';





for(var i=0, post; post = json.feed.entry[i]; i++) {

var timestamp1 = post.published.$t.substring(0,19)+post.published.$t.substring(23,29);
timestamp = encodeURIComponent(timestamp1);


var title = post.title.$t;

if(title!=''){
if(itemCount==0 || (itemCount % pageCount ==(pageCount-1))){
 if(thisUrl.indexOf(timestamp)!=-1 ){
   thisNum = postNum;
 }

 if(title!='') postNum++;
 htmlMap[htmlMap.length] = '/search?updated-max='+timestamp+'&max-results='+pageCount;
}
}
itemCount++;

}

for(var p =0;p< htmlMap.length;p++){
if(p>=(thisNum-displayPageNum-1) && p<(thisNum+displayPageNum)){
if(fFlag ==0 && p == thisNum-2){
 if(thisNum==2){
  upPageHtml = '<span class="showpage"><a href="/">'+ upPageWord +'</a></span>';
 }else{
  upPageHtml = '<span class="showpage"><a href="'+htmlMap[p]+'">'+ upPageWord +'</a></span>';
 }

 fFlag++;
}

if(p==(thisNum-1)){
 html += '<span class="showpagePoint">'+thisNum+'</span>';
}else{
 if(p==0){
   html += '<span class="showpageNum"><a href="/">1</a></span>';

 }else{
  html += '<span class="showpageNum"><a href="'+htmlMap[p]+'">'+ (p+1) +'</a></span>';
 }
}

if(eFlag ==0 && p == thisNum){
 downPageHtml = '<span class="showpage"> <a href="'+htmlMap[p]+'">'+ downPageWord +'</a></span>';
 eFlag++;
}
}
}

if(thisNum>1){
html = ''+upPageHtml+' '+html +' ';
}

html = '<div class="showpageArea"><span  class="showpageOf"> Pages ('+(postNum-1)+')</span>'+html;

if(thisNum<(postNum-1)){
html += downPageHtml;
}

if(postNum==1) postNum++;
html += '</div>';


var pageArea = document.getElementsByName("pageArea");
var blogPager = document.getElementById("blog-pager");

if(postNum <= 2){
html ='';
}

for(var p =0;p< pageArea.length;p++){
pageArea[p].innerHTML = html;
}

if(pageArea&&pageArea.length>0){
html ='';
}

if(blogPager){
blogPager.innerHTML = html;
}


}


function showpageCount2(json) {

var thisUrl = home_page_url;
var htmlMap = new Array();
var isLablePage = thisUrl.indexOf("/search/label/")!=-1;
var thisLable = isLablePage ? thisUrl.substr(thisUrl.indexOf("/search/label/")+14,thisUrl.length) : "";
thisLable = thisLable.indexOf("?")!=-1 ? thisLable.substr(0,thisLable.indexOf("?")) : thisLable;
var thisNum = 1;
var postNum=1;
var itemCount = 0;
var fFlag = 0;
var eFlag = 0;
var html= '';
var upPageHtml ='';
var downPageHtml ='';



var labelHtml = '<span class="showpageNum"><a href="/search/label/'+thisLable+'?&max-results='+pageCount+'">';
var thisUrl = home_page_url;


for(var i=0, post; post = json.feed.entry[i]; i++) {

var timestamp1 = post.published.$t.substring(0,19)+post.published.$t.substring(23,29);
timestamp = encodeURIComponent(timestamp1);



var title = post.title.$t;

if(title!=''){
if(itemCount==0 || (itemCount % pageCount ==(pageCount-1))){
 if(thisUrl.indexOf(timestamp)!=-1 ){
  thisNum = postNum;
 }

 if(title!='') postNum++;
 htmlMap[htmlMap.length] = '/search/label/'+thisLable+'?updated-max='+timestamp+'&max-results='+pageCount;

}
}
itemCount++;
}

for(var p =0;p< htmlMap.length;p++){
if(p>=(thisNum-displayPageNum-1) && p<(thisNum+displayPageNum)){
if(fFlag ==0 && p == thisNum-2){
 if(thisNum==2){
  upPageHtml = labelHtml + upPageWord +'</a></span>';
 }else{
  upPageHtml = '<span class="showpage"><a href="'+htmlMap[p]+'">'+ upPageWord +'</a></span>';
 }

 fFlag++;
}

if(p==(thisNum-1)){
 html += '<span class="showpagePoint">'+thisNum+'</span>';
}else{
 if(p==0){
  html = labelHtml+'1</a></span>';
 }else{
  html += '<span class="showpageNum"><a href="'+htmlMap[p]+'">'+ (p+1) +'</a></span>';
 }
}

if(eFlag ==0 && p == thisNum){
 downPageHtml = '<span class="showpage"> <a href="'+htmlMap[p]+'">'+ downPageWord +'</a></span>';
 eFlag++;
}
}
}

if(thisNum>1){
if(!isLablePage){
html = ''+upPageHtml+' '+html +' ';
}else{
html = ''+upPageHtml+' '+html +' ';
}
}

html = '<div class="showpageArea"><span  class="showpageOf"> Pages ('+(postNum-1)+')</span>'+html;

if(thisNum<(postNum-1)){
html += downPageHtml;
}

if(postNum==1) postNum++;
html += '</div>';

var pageArea = document.getElementsByName("pageArea");
var blogPager = document.getElementById("blog-pager");

if(postNum <= 2){
html ='';
}

for(var p =0;p< pageArea.length;p++){
pageArea[p].innerHTML = html;
}

if(pageArea&&pageArea.length>0){
html ='';
}

if(blogPager){
blogPager.innerHTML = html;
}


}


</script>
<script type='text/javascript'>

var thisUrl = home_page_url;
if (thisUrl.indexOf("/search/label/")!=-1){
if (thisUrl.indexOf("?updated-max")!=-1){
 var lblname1 = thisUrl.substring(thisUrl.indexOf("/search/label/")+14,thisUrl.indexOf("?updated-max"));
}else{
 var lblname1 = thisUrl.substring(thisUrl.indexOf("/search/label/")+14,thisUrl.indexOf("?&max"));
}
}

var home_page = "/";
if (thisUrl.indexOf("?q=")==-1){
if (thisUrl.indexOf("/search/label/")==-1){
 document.write('<script src="'+home_page+'feeds/posts/summary?alt=json-in-script&callback=showpageCount&max-results=99999" ><\/script>')
}else{document.write('<script src="'+home_page+'feeds/posts/full/-/'+lblname1+'?alt=json-in-script&callback=showpageCount2&max-results=99999" ><\/script>')
}
}
</script>

Note:
Change values of pageCount,displayPageNum,upPageWord,downPageWord if you like.

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