We're not exactly sure what you're talking about, but here's how to do avatars, sigs, etc.
All these are found in the User CP (top left).
Avatar - Choose "edit avatar" on the bar on the left. Choose one from the galleries. For example, my avatar is Samus Aran and Hoshi's is Steelix, in case you didn't know what an avatar is.
Sig - This is a bit harder. You need to follow the sig rules, though.
1) Go to imageshack.us, photobucket.com, etc. and upload a picture you have saved on your computer. Or, google a pic, right click it, choose properties, and copy the url.
2) Use this code;
on the edit signature option in the user cp.
Hope this helped. ^^