Cobalt LS Turbo

Hey all, I'm kinda new to this, but I'm sure that I want to put a turbo in, unfortunately I don't know what all needs to go into it. I know you have to reinforce the engine quite a bit to handle the increased air pressures and such, but other than that I have no idea what to do. Anyone have suggestions? I'm planning on doing a gradual upgrade, not everything at once.

Parts to reinforce...
Prices...
Links for parts...
What should I start with first...
Do they have turbos yet, and what stages are available...

Thanks for all your help.