mk3 gti 8v turbo project.

i have a 1998 gti mk3 2.0l 8v that i would like to install a turbo on. i just got a free turbo from one of my buddies and he said it will for sure fit my gti. i dont exactly know the specs of the turbo, but i will figure it out. i need to know everything else that i will need to buy to install...