Turn off the car, close all doors, then press lock, then press unlock on your keyring. That should work. The other way to go would be removing the fuse for the alarm while is off.
This is a fairly broad question becomes there are many different models of your type of car. I would either consult a mechanic personally, or refer to your user manual.
Why are you asking this question? Either you are a thief trying to steal a Camry, or your trying to make it easier for somebody else to steal your car.
You need to locate the wiring harness for the anti-theft device in the car. Once you locate it, just simply cut or remove the wiring peice to the harness. Another way is to remove the fuse locaed in the fuseb ox.
