First of all, let me say that I'm very sorry for your loss. It's always a difficult time when we lose our parents. My condolences to you and your family.
Now, as for your question, I would recommend that you consult an attorney. There are just so many questions that we cannot answer because we don't know your circumstances. Was there a will?? If so, did he leave the house to you? Did he leave it only to you or are there other heirs?
I would suggest talking to your attorney or AN attorney to determine what your rights are and how much time you have to get this done. The redemption periods vary (most are 6 months), so you may be up against a time limitation, too.