What engine do you have?
Timing belt w/ tenioner/idlers
Variator/repair kit if you get the diesel sound
Variator half shells if replacing the above
Rocker Cover Gasket
Variator half shells
Water pump (Recommended)
Coolant if the above is done
Aux belt if the old one is cracking/ageing
Locking tools if your doing it yourself or the garage doesnt have the tools
DTI Guage, TDC Indicator attachment as above.
Service w/ spark plugs (may aswell do it all at once
Purely up to you if you want to do some bits, just getting the timing kit and water pump will suffice for most.
Edit: bit pointless now