Well, here, you take the hand guns and immediately turn them in to the police station, making a statement of how you obtained them...and hopefully this was "inherited" so the original owner is not in any trouble. And hopefully you are not in trouble either. :-)
The rifle, you first go get a permit to transport, then take to the gun dealer and fill out a bunch of paperwork.
Or hide it in your basement somewhere for 50 years for your kids to find after you die and deal with... (DAD, I am talking to you, I know you still have your (not registered) childhood shotgun somewhere).
Don't worry about the ammo -- maybe make bottle rockets and u tube videos with the gunpowder.