My husband and I just bought an old house and refinished floors in two rooms. Check in a corner to see how the carpet is connected. Ours pulled right up. I can't help you much there. For refinishing, there are two basic methods - aggressive and passive. Aggressive is for more physically damaged or marked wood. Rent a sander or hire someone to do it. We rented one and used three different grades of sandpaper. This method will actually wear away the top layer. Passive is just that- use stripper to remove the finish. After taking off the top layer or finish, use a tack cloth to remove dust, them give it a couple of coats of polyurethane. I'm not sure I got everything in here, but check with your local Home Depot or Menard's or whatever you have.