[Qmulus]

Actually, the easiest and I think "right" way to fix the car is to get one remote and one key (or more) key to match the rest of the car and get the ignition tumblers to match it. A good locksmith can do this, or you can get a key pre-cut from a dealer by VIN. To avoid having to reprogram the key to the car, you would just replace the actual blade of the key, as there is a transponder (looks like a small glass pill) in the remote housing. Perhaps someone just lost the keys and took a cheap way out to get it running again. The problem with that theory is that they would have had to program the alarm/immo module to match the new key, which would pretty much mean going to a dealer, and I don't know of any dealer that would do something like that.

Hopefully you have the right alarm/immo module in the car. If not, then things will get interesting.