Posessed alarm?!

[Michael Blue]

I have an alarm in my car, not sure if it's OE or not.
When I lock the car, the "security" light flashes...
After a couple minutes, the lights blink, the security light goes solid, then flashes very slowly.
When you unlock and open the car, an alrm is triggered and the lights (inside and out) flash, and the horn honks.
It shuts off only when yhou start the car.

I do not have the remote for the car, only the key.

Anyone know how to disable, or have a remote with programming instructions they can sell?

Thanks!