I have had an offer accepted on a 75 year old house in New Jersey with knob and tube wiring. All of the outlets upstairs are two prong. There appear to be some outlets downstairs that have been grounded. The home inspector recommeded that we put in GFI's. The breaker box has multiple wires and they are not separated properly into individual circuit breakers. The sellers rufuse to give us anything towards upgrading the electrical, so if we buy the house, the cost is on me. While I know the cost depends on many factors, what is the ball park price range for upgrading an older home? How hard is it to do? Do you have to rip out walls? Can outlets be added? Please, any help with this would be greatly appreciated. I am a first time homebuyer and don't want to get into a money pit. We have to decide if we want to buy the house.