...pickup and Toyota land cruiser# I want to know how many kilometer you go for to finnish 1gallon of fuel oil

I have a 1985 Hilux 4x4 and I get 10km per litre of diesel around town and 11.5 km per litre on a highway trip, I don't know the figures for your model but hope this helps. It is also extremely reliable still after doing more than 320,000km and does not blow any black smoke from exhaust.