Loco, I assume you're simply looking for a way to ensure that the car won't start when you don't want it to. (i.e. to protect against theft or whatever)
Yes, under the driver's seat there is a little square connection piece. I can't remember what it's called, but if you look under the seat you can't miss it. It's most likely held in place by a little bracket coming through the carpet. If you simply pull the square connection piece out of the receiver, the car will crank and crank and crank, but never fire. And you simply have to just plug it back in to get the car to start. I learned this while putting in my new interior.
As for the fuel shut off switch. It's located behind/underneath the paneling in the hatch. You have to take off the paneling as if you wanted to access the wiring to the tail lights. There's a little yellow (if my memory serves me correctly) button and you just push that, and it will disable the fuel pump. This too, will prevent the vehicle from starting until the button is pressed again.
Hope that helps.