Go talk to some people who own or have experience with the different kits and look into something like a Greddy kit.  It will come with everything you will need to get a feel for what its like to own a turbo car.  There are big differences in bolt on turbo kits and built turbo cars.  You really need to experience the first before you commit to building a motor, it takes a lot of time, patience and hard work to do it right and with time you get faster and better at it.  Run the stock block with the kit for a while, dont push the boost up to high or you'll experience what stops many people from continueing on the the world of turbos, a blown motor.  If you do decided this is for you, then start looking around and talking to people about engine builds and have some fun.  Good luck