4. No, the wheel's rim should be in the middle of the forks. Is the hub loose? Can you re-adjust the wheel in the dropouts to make it work?
2. Spraying WD-40 on things that make noise is almost never a good idea. It never really fixes the problem.
1. You're going to have to know something about the bottom bracket in order to even come close. Is it a square taper? Loose Ball or Cartridge? Spindle-length? Shell width? Don't buy anything until you can be pretty sure it'll work. Is the bottom bracket in good shape? If that's okay, the only tool you should need is something to torque the crank bolt, since you won't need to adjust it or remove cranks... whatever bolt your bottom bracket uses is all you'll need. Do you know what cranks were on it?