Your oil leak is most likely due to the rubber gasket on the filler cap. Get a new one; they regularly go bad (harden & don't seal.) Although it's a long shot, has oil leaked down into your spark plugs? probably not, if you don't have spark. I'm not a pro with electrical, but is your coil okay? The only other thing I can think of (and it is NOT related to your "no spark" condtion) is that there can be problems with the fuel pump relay. Good luck.