Your engine is 4 stroke and takes regular unleaded. There is oil in the sump (well there should be) for lubrication. It's a good idea at this point to check it. There is a round filler plug near where the engine bolts to the deck. The oil should be filled to the top of the thread. I can add some more photos if need be.
The clutch cork should be replaced as part of your restoration and is not expensive. When you get to the dissassembly stage, take some pictures and post them up
