90 tempo where are the timing marks located at and how many fuel filters are there?

The timing marks are most likely listed someplace inside the engine bay. Pop the hood and look at some of the diagrams/writing, it may be there. As for the fuel filter, there is only 1 which is located to the passenger side of the engine compartment about halfway back, it's a round cylinder shape and has 1 inlet hose and 1 outlet hose. There is also 1 fuel pump which is located in the gas tank itself. The cutoff switch for that is located in the trunk on the left side, pull back some carpeting and you'll see it, that is of course if the sticker isn't still on there telling you where it's at.