How do you program new key for Toyota caldina 2004?

To program a new key for a 2004 Toyota Caldina, you'll typically need to have two working keys. Insert one working key into the ignition and turn it to the "On" position without starting the engine. After a few seconds, turn it back to "Off" and remove the key. Repeat this process with the second working key, and then insert the new key you want to program and turn it to "On." The new key should be programmed after a few seconds, and you can test it to ensure it starts the vehicle. If you don’t have two working keys, it’s best to consult a professional locksmith or your local dealership for assistance.