Cory Culver

The person i got this jeep from didn't drive it much. Had 106k miles on it and I've put 6k since I've had it. He let it sit up awhile so have a few problems. Rusted rear bumper. Rusted a hole under body below driver door. Rusted on roof by windshield so it leaks. Water drips in by feet on passenger and driver. Floor is very weak,almost gone on driver. How difficult would it be to replace the seats(For some reason the stock are $250 and nice ones were $140?),floor for driver,carpet and fix patches of rust