First off, DO NOT double post. If you have something to add to a post and you're the last/only post in the thread, edit the existing post.
Second, read all forum rules and sticky's. If you had, you would have saw this in the introduction section.
How do you add an avatar and signature?
as for adding custom avatars, you need to be a Community member for those, and for animated avatars, you need to be an Elite member.