if you have pictures that would be a start. If someone already looked at the car there no sense in giving suggestions cause mostlikely the suggestions have already been inspected.

would help us, so we can help you.
p.s. by the belt having oil, the oil leak is obviously on the left side of the engine (looking at it from the front) cause thats where the belts are. Also it would help if you lets us know what people or you have already checked.