The answers you're getting are not legal advice. Please contact an attorney. A phone consult will probably get you directed in the right direction. He/she will probably want to see a copy of your contract. Don't wait, just do it, NOW!

Kim Eisen
Realtor since 1980

So, you've already purchased? Did you have an inspection done? If not, that was a mistake, as I'm sure you know now! Did you not see the black mold on the wall before you bought the house? Did you see the toilet almost falling through the floor? If you saw these things and still bought the house, then it's kind of your own responsibility. Even though you may not have known about the roof, these are things easily visible. Finally, your agent will be able to advise you about whether or not you have any recourse. Did you have an "as is" addendum in place? If not, you may be able to pursue arbitration. I would consult an attorney and your real estate agent.

Pattik,

The seller's advertising is fairly irrelevant to the matter - it is meant to describe and not to carry warranties. The only hope that you have is if the seller's knew about these problems and made material misrepresentation on the seller's property disclosure (one is still required - even in an as-is sale). Failing that you can always bring an arbitration or a lawsuit but it is not likely you will have much luck using the ads as evidence. Regardless, I would recommend that you contact an attorney to get an understanding of the entire legal situation before moving any further.

Cameron Piper
#1 Trulia Agent in MN

An As is addendum information attached.
As is: you buy what you see as you see it.
As is addendum is to protect the seller.