"At an absolute minimum, I would suggest four guns for the backwoods home. These would be a .22, a shotgun, a defensive-type handgun, and a high-powered rifle."
That quote came from this great post on An economic firearms battery that I suggest everyone reads. If you are just getting into guns this is an essential read. Even if your basic firearms battery is sitting with lots and lots of friends in the safe I doubt you will read something by Massad Ayoob and feel like it was a waste of time, I know I never have.