Ignition Kill Switch?

Pretty straightforward, on-on have 3 terminals so you wire top or bottom terminal with the middle pin of the next.

 

Is there an OEM glass break sensor that can be added?
I know Tacomas have a dealer option for the "Vehicle Intrusion Protection (VIP) alarm system" which I believe is just a glass break sensor that sets off the car alarm. PN: pt39835160.

Is there an option like this for our 4Runners?

 

YOU CAN DO IT! The skills required to add a kill switch are pretty basic and easily acquired. I acquired them from a set of short books I bought from Radio Shack in the 1980’s. Look for a pdf of “Getting Started In Electronics” by Forrest Mims. His books are hand written on notebook paper, and very easy to follow.

Here are a couple of pages:

 

Forrest Mims is (was?) The Man!

 

My house was burglarized when a thief broke a kitchen window and let himself in.

It happens more often than you think. IMO kicking a door in would be louder and attract more attention than breaking a window.

 

Good lord people, my comment was about taking steps to mitigate loss. Never once stated there was a way to eliminate it.