problems with 96 jetta gl volkswagon alarm

HELP!!! How do you deactivate a 96 jetta volkswagen. I can't start the car. This is a brought used vehicle which I didn't know had an alarm. I think I made a mistake and activated it through the ignition alarm when I parked and shut off the engine. It seems like it has a DUEL alarm. I can deactivate the alarm by locking the doors and unlocking with the key. However, when I tried to start the engine it won't start. I don't see any switch that is related to the alarm to deactivate.

Can anyone tell me where I can get a manual without paying an arm & leg for it???