[War_Wagon]

You can get keys cut at a dealership. They will (or should) ask for a copy of your registration along with the VIN, in order to prove that you actually own the car you are getting the key cut for.

If you don't know the history of your car though, it may not always work. If the car was ever stolen for example, the ignition may have been punched, and replaced by a used one from another car that came with a key in order to reduce the repair costs after the car was recovered. This is not entirely uncommon, but most times the factory key codes the car was made with will still be the correct ones.