Speak to Audi direct. It will be GL4 or fully synthetic GL5. Takes about 2.3 litres, probably 75w-90. Always release the fill plug before releasing the drain plug.
On the subject of bushings, any knocks or clunks, deal with them here. Usual suspects are upper arms, drop links and ARB bushings. Fit Meyle HD or Lemforder.
Budget for a full set of winter tyres. Can recommend Kumho WinterCraft tyres.
As recommended, change your antifreeze. Timing belt is due every 60k miles or 5 years. Include water pump, tensioner pulley and genuine thermostat. No fun braving a winter with a dodgy thermostat.
Headlight conversion kit too.