I have read this thread and summarize the following conclusions (correct if I am wrong):
Installation of aftermarket immobilizer (or whatever you all them) for Corolla involves tampering of electrical wiring to insert relay/switch which has two disadvantages. First a good thief can bypass relay/switch easily and secondly it voids the warranty.
Corolla ECU cannot be re-programmed unless replaced by a hacked one.
All kind of radios can be jammed and today's thief are well equipped... either it's a 2 way secure radio or any other, in case of jam it will not work at all.
For TALA lock I am not sure and if someone claims it works please post photos.
After all we pay for more than Rs. 1.7 million for a new Corolla and the Indus Motor Company doesn't even bother to introduce some unique security system for the car... they simply hand over simple keys and assume rest assured!
Maybe some people know how to secure their Corolla but they will not speak on this forum as their method will be exposed and become vulnerable???