Deleting keyless entry key

See your local Toyota dealership. They are the only ones who can do this. Make sure you have all key fobs with you that you want to program. They can erase and reprogram the keys. Keep in mind any "blade" keys, such as that inside your fob, can still be used to enter the vehicle unlocking the driver's door lock key cylinder manually. Although that thief will not be able to steal or drive your vehicle, he/she can still get in unless you change the lock cylinder and rekey that as well.