Oil on spark plug..
#2
First thing I'd do is pull the throttle body off and see if you have oil in the intake....if so I'd put a catch can on the car, run it for a while then check the plugs again
#4
10 Second Club
I agree with the catch can but I would also pull a valve cover and see if I could see the valve seal on that cylinder. I had a valve spring break and it shredded a seal. It burned quite a bit of oil until I found it though.