2007 Prius won't start and oil is coming out from the exhaust pipe.

I have a strange situation. My car would start once in the morning and would never start a second time after the engine is off. I get the red traingle and all the lights on my dashboard. I have recently changed two cells in the hybrid battery (I beleive my hybrid battery is fine now). I also noticed a strange thing, which is the oil comes out from my exhaust pipe whenever I start my car in the morning. I recently changed the oil and believe I overfilled the oil. On a side note, my car was in the garage for a almost a year, when I came I had to change the 12V battery and change two cells on the hybrid battery (My 12V battery is new and hybrid battery in good standing). Has anyone been in this situation before? Any thouths? Thanks!