How can I deactivate the alarm system?

SOURCE: when you try to start

I had the same problem last week ---- turn key to "on" position and then press and hold red button on dash for 3-9seconds and the alarm will stop. engine should now start.

EVERY Toyota dealer I called did not know what to do nor could they offer any ideas.
I figured it out after hours of playing with different paths.
This one actually worked..........

SOURCE: 1999 toyota camry horn beeping when i replace the battery

I put a new started in my 99 camry the alarm went off and I didn't know how to stop it ,now my car doesn't have any power the battery is new but its not giving my car any power.Help...

SOURCE: My car won't start be cause the alarm sounds as soon as i turn ke

I have a 95 camry 2.2 and it did the same thing. i helped jump a buddy's car then the horn started sounding. so i called the parts service for toyota they told me theres a switch under your dash, on the floor board, right above where the left is placed. there was a switch, he told me to flip it then my car started working no problem. that was about 1 yr 1/2 ago.

SOURCE: turn off alarm

put the key in the driver's side door key hole and turn the key to unlock it. Turn the key twice in the direction to unlock, I think it's top of the key towards the front of the car. Works on my wife's car

SOURCE: 2005 Toyota Corolla Car Alarm Problem

you may have to disconnect the battery for a minute or so ,this will reset the alarm. check your remote it does have a battery in it. otherwise you have to look for a fuse somewhere under the dash close to the fuse box.each one is diff. depending if it original toyota or aftermarket alarm.