How do I drive my car withou the alarm going off when my car remote for the immobiliser won't work?

SOURCE: alarm remote

Look under the driver side seat for a small black box. This is the control for the remote/alarm system. Check to see that it is not wet. Open it up & inspect the circuit board. Are any of the circuits corroded/greenish powder on them? If so, you need to replace this box. Quite a common failure. But, there IS hope. You CAN start the car without the aid of the remote since you lost it. Put the key in the ignition, and, if the lights start flashing, CYCLE the key on-off 5 times. This action will defeat the alarm, and the car will start. This is provided in case the battery in the remote goes dead on you.

SOURCE: central locking remote won't open car/car won't start

Sounds like a basic bad battery. Even though its not that old it can be bad....and probably under warranty. Immobilizer or starter will not cause that. Get the bat tested.
Only other thing is called a "parasitic draw". This is when something is drawing current from the battery when its supposed to be off. Usually this causes a totally dead battery, not a weak one like you have.

SOURCE: can not lock car by key remote . toyota rav 4 53 plate

If your car has an alarm with a separate remote, it is a separate system and it is probably self-arming. When you lock the doors with the key central lock, the alarm gets armed by the RAV4 being OFF and the door locking action. When you unlock the doors with the key, the alarm is still armed because the key is not comunicating with the alarm just the cars factory keyless system.

SOURCE: remote does not open doors

have u checked and replaced the battered in ur alarm/central locking fob ??

SOURCE: 1999 Toyota Avalon, key fob locks doors, but will

hello the identical thing is happening to me did you find out what was wrong? regards Ellen