If you've just bought the van then it is a good idea you had to do the belts.
Assuming yours is the 1.8D, then it has two belts.
One belt powers the injection pump, this is nearest the engine, then just next to this is the main belt that powers the camshaft.
The belts are easy to do, though a timing kit is a big help, about £12-£15.
A lot change only the main long belt, but when the smaller pump belt breaks it can only go into the main belt, and lead to disaster, and always do so, that's why best to do both.
I think my last set I bought were about £55.
The fuel filter should also be changed, again easy, the tappets are easy to do but people shy away from them, even the ford dealers, they are shim adjust but if not tappety leave alone.
Apart from that normal stuff, oil/filer and air filter is about all.
They are a bloody noisy engine but are tough if looked after.
The recommended interval is every 36,000 for the belts.
tabetha