take all plugs out, put rag over (not in) plug holes and spin over the engine will get enough oil out
then check too see if your engine will turn over by hand with a wrench
befor you put the plugs in
seems a bit odd to me if your battery keeps going flat ther is no smoke leeking out of your loom anywhere is there?
like you have some form of short in it
a big spark would be a give away when you conect it up to the battery
or it may only be shorted with the ign on possibly