Used purchase CRV – petroler how much fuel consumption?

Hello men! My father wants to buy a used Honda CRV around the year ’03. At the dealer these are to get for about 14000 €. Since he as a pensioner does not drive much, it should be a petroler. Now some questions: – How much is such a CRV drinking on average? – What engine variants are there? – How much load can you attach? – Are there flaws and flaws to which one should pay attention? – How about the taxes? – Is the all-wheel switchable? Or rather a diesel? Would it be nice if some CRV drivers could write their experiences!