Hei.
Drive your car onto a flat area. Unscrew the plug on the front of the gearbox. I think you need an "allen key" - not sure about the tool's name, but it has six edges. If oil drips out, it's full. If nothing happens you should add oil until it comes out from the filler hole. Use a garden hose, and a "round Y-shaped" gadget which I don't know the english word for. If the gearbox oil has been there for over 100.000 km renew it, unscrewing the plug on the rear bottom of the gearbox. This plug needs the same tool as described above, but a smaller one. As far as I can remember there's metric sizes. Renew with GL-5 viscosity, at least GL-4.
Morten.