As far as I can tell there is no obligation on the part of the seller, inspector or the real estate agent to disclose the use of cigarette's by the owner or owners of the home.  I would suggest that you speak with an attorney in the matter as well as some one who could see about helping you abate the problem (remove carpets, etc.). I am going to copy a form here that you should have gotten at closing. Good luck.http://www.ct.gov/dcp/lib/dcp/pdf/realestate_licensing_forms/disclose.pdf