Ask a landlord-tenant lawyer and get answers ASAP
When you say that your parents "rented the house", do you mean that they rented it out to someone else, or that they rented it for themselves to live in? Are you saying that the home you lived in for 15 years was supposed to be on a separate lot that was to be given to you? Are both homes on the same lot? Did your father actually sign a deed over to the other people for the house next door, which Deed you claim was fraudulently obtained? As you can see, your facts do not present a clear picture. If you can restate them in a more orderly fashion, I might be able to come up with some useful information about where you stand.