A good driving challenge its going to be!
Petrol (gasoline) prices go up and down. Today Unleaded is 53 pesos per liter and Diesel 43. How much you get per mile depends on traffic conditions air con etc. In Manila they have a coding system based on the last digit on your plate but it doesn't apply once your in the provinces. If your plate ends in 1 or 2 you cant drive on Mondays, 3 or 4 Tuesdays and so on.
Best check with your doc on jabs. Tetanus i would say is the most important.