Golf 2.0 8v | 1.8 | TDI 115 | TDI 110 | TDI 100 | TDI 90 - 280mm - you need the hubs and discs, calipers and pads are the same.
Golf GTI 1.8T | Golf 130/150 TDI | Golf V5 150 | Seat Leon 130/150 TDI and 20VT - 288mm - you'll need everything! Hub, calliper, carrier, pads, discs, splash guards.
All this is a hell of a lot of work. Buy yourself some decent pads, discs and brake fluid, you'll find it makes a hell of a lot of difference!