simple question
 

how do you set it up so when you post there is a signature some ppl on her have thier bike quotes etc?

This should be moved to the forum help & suggestion center. Maybe a mod will move this when they get to it.

To edit your signature, once you are logged into the site, click on the "Private Messages" link at the top right, then you will see your profile command center with all of the links on the left. You can add (edit) your signature, avatar, etc. from there.