I think there is a centrifugal oil filter on the right hand on the engine. It dose not look like a "normal" oil filter.
For the hydraulk pump and PTO there is an arm on the left side on the floor. It can be set in 4 possisions. Pump, pump and pto, neutral and PTO road-dependent. It might be set in neutral. On the same side on the floor there should be an arm I think that can be turned and pushed up or down for the 2wd/4 wd.
Hazze