(If you subscripe to the site, to support it, you can choose your own custom title though - also you will not get adds when supscriped )
The little picture is an avatar. It can be set up by going into the "user cp" menu - then "Edit Options" and down in the buttom you can find the avatar options.
The avatar needs to be 50x50 pixles at the most and you must provide one yourself.
Hope this helps a little
Just ask if you have more questions - I (and all the others) will try to answer them to the best of our knowlegde.