Can vBulletin do this?

[Unarmed Gunman]

I have a small forum that I am getting ready to heavily promote, and hopefully take to the next level. I am currently using a heavily modified version of phpBB, including categories hierarchy which allows unlimited subforums of subforums of subforums etc. including the ability to use different themes for each subforum, and even a classified ads script. I am considering buying a vB license for several reasons, but I want to make sure that a couple of the things that I can currently do with my forum, can be accomplished equally well or better with vB. The forum is at www.mynextcollege.com

* Is there something similar (a plug-in) to what I have at "The Exchange" - namely, the ability to provide free classified ads space for users?

* I see that unlimited subforums are standard, but can I give them each a different look similar to the schools I have in the Michigan forum each showing up in their own school colors?

* Can I use different icons to represent each subforum such as I have done with the states and most of the subforum schools?

* I don't have alot of posts to save, but would it be possible to import from my modded version to vBulletin?

Thanks very much for any insight or suggestions. I really like what vBulletin has to offer and if I can do these types of things and more I will definitely be getting a license. I was a staunch supporter of phpBB, but delay after delay with releasing phpBB 3.0 got me to look closer at vBulletin. VBseo closed the lid on it, and if I can do these things with vb those would be the nails in the coffin.