Dude, a land cruiser already has more than enough power for a teen who can't even drive on the roads legally yet. First of all what you want to do is illegal and a fine-able offence so don't expect too much help on an open forum and secondly Derick is correct, all those "arab dudes" you are talking about spend small fortunes and countless hours in garages modifying their cars, a lot of trial and error is also involved with a lot of blown engines, transmissiosn etc etc. If only if it were that easy by just slapping on a junked turbo from a scrapyard.
I wouldn't even let my kid have something like a land cruiser as a first car, I'd let him ding about in a jap ecobox for a year or so to learn the ropes and get a few fender benders out of the way first before getting him something halfway decent.
So my sincere advise, 1st get a license, then learn how to drive and get comfortable with it and then maybe, just maybe even think about mods like turbos and sh!t. An over enthusiastic kid who grew up play Gran Turismo and Forza, already talking about boosting a car he cannot even drive yet, you know is not going to end well.
Too many kids already dying or ending up crippled on the roads here already because of their love for speed who end up driving car with way more power they can handle, so think real hard if you want to become just another statistic