Follow this steps to implement page navigation in blogger/ show page number in blogger.
After installing this gadget code proceed for label fix
Step 2 : Navigate to Layout/Design > Edit Html
Step 3 : Don't click the checkbox "Expand Widget Templates"
Step 4: Now find this ]]></b:skin> and replace this with below code
This is the CSS part which defines the look and feel of the page navigation. You can modify it .
where you can modify ?
this code determines the number of post that would be displayed per page
This code determines the number of additional page navigation numbers that will be displayed on the page
this two lines determines the text that would be shown for the previous page and next page.