[boxhead]

Dont know why I did not twig to this earlier.
But the new 150 series Prado's (most likely the same as a lot of newer cars) has a keyless system, in that you have a key fob that needs to be close to the car and, depress the clutch and press a button on the dash to start the car.
I tested this morning, it does have a steering lock, I would suggest it is electric but has no direct connection to an ignition switch.
So maybe look at one of these type systems or colomns to use?

I am sure being a Toyota product it would be pretty well thought out as far as failsafes going.