You'll need a pair of 9006 Bulbs for the Low Beams and a pair of H11 for the fogs.
I'll suggest leaving the High Beam bulbs (9005) stock and don't get the night breaker or X-treme Vision for the fogs either. Stick to stock or get Yellow Halogens, Luminics or Osram although they can be difficult to come across here.
About the price, you'll have to survey obviously.
You should always get replacement bulbs according to the detail mentioned on the housing.