Excluding the engine, I put about $6,500 into mine. This includes wiring harness, intercooler and intercooler plumbing and fan, carrier bars, bellhousing, clutch, ecu, MKIV accel pedal, coolant hoses, timing belt, water pump, fuel filter, air filter box and filter, exhaust system, etc. It also included having the trans re-geared to match the power curve of the TDI. Mine is a Syncro which has a few extra expenses (diesel Syncro tank, modified skid plates) so for a 2wd you would probably save about $1000 from what I spent.
Brent