Couple Dumb questions...

The seat tracks should have a stud pressed into it that poke down through the floor pan where a washered nut comes up from the bottom to hold the seat in. If it looks like the nuts won't come loose without breaking the stud off, I would cut the nut off with a nut cracker, chisel, grinder....something that will leave the stud intact. You can clean the stud up good after the seat is out. If you break the stud, you'll end up having to use a bolt and nut which is a pain to do with one person.