Furthermore, most states require that if there were existing conditions in the home that were not visible, the sellers and the seller's agent should have disclosed that information. Ask your Realtor to call the listing Realtor to resolve these problems.
If there are no Realtors involved, we are not attorneys and cannot provide legal advice, but we suggest you might want to contact the seller calmly and tell give them the list of problems and the expected costs to repair. If they do not respond, you may want to consult an attorney. This cost of the repairs may or may not warrant this action. Of course, if you win the legal action, whoever wins generally pays the legal fees. Hopefully the seller would have the funds to do so if they lose. You could also try Small Claims Court.