You should search for the exact components you need to build a turbo kit. There are several other things you didn't mention like oil lines, injectors, fuel management, manifold, wastegate (unless the turbo already has one built in), etc.

IMO, buy a complete kit unless you really know what you need/what will fit/don't need serious performance increases. Start with the suspension first and then down the road, if you have the money and passion, get the turbo. Just get educated and know what you are getting yourself into. Most novices think you can just bolt a turbo on and that's that. It requires lots of time, money, and dedication to turbo any car. Just keep that in mind.

About the clutch, if you want to upgrade, I have heard great things about the ACT HDSS. It would be a good upgrade to have for the turbo but the OEM one is fine as well if you don't feel like upgrading at this point in time.