Page title before.
1) Open a browser and go to Blogger.com.
2) Click on "Theme".
3) Click on "Edit HTML".
4) Focus on template code area and find:
<title><data:blog.pageTitle/></title>
5) Replace it with this code:
<b:if cond='data:blog.pageType == "index"'><title><data:blog.title/></title><b:else/><title><data:blog.pageName/> | <data:blog.title/></title></b:if>6) Save template and view result.