Login to blogger dashboard --> layout --> Edit HTML
Now scroll down to where you see the codes below:

Middle Menu
<ul id='navinti'>

<li><a expr:href='data:blog.homepageUrl'>Home</a></li>

<li><a href='#'>About</a></li>

<li><a href='#'>Archive</a></li>

<li><a href='#'>Comments</a></li>

<li class='dgnsub'><a href='#'>With Sub Menu</a>

<ul class='sub-menu hidden'>

<li><a href='#'>Sub Menu</a></li>

<li><a href='#'>Sub Menu</a></li>

<li><a href='#'>Sub Menu</a></li>

<li><a href='#'>Sub Menu</a></li>

</ul>
</li></ul>


Just replace "#" with your menu item URL.




Change profile image picture:
find this image link:
http://lh6.googleusercontent.com/-S_u47sY4Ias/AAAAAAAAAAI/AAAAAAAAFWs/nVcUUPYZkmQ/s50-c/photo.jpg

and change with yours profile image link..

