start reading up on things before you start buying all that stuff. from what you have said you have alot to learn.
avoid ebay turbochargers unless there genuine items, if you fit a K04-001 turbo then you will need a proper remap, not some crap advertised on ebay. passat 007p recirc valve? Forge do a 007p for a golf and it will need a stronger spring if running a k04
i could go on but suggest you read up on things before you start wasting your money on ebay cheap stuff