I'm assuming you are taking the pre-reqs in the Post-Bacc program? If so, don't worry about the MCAT yet. Focus on learning everything well and making sure there are no gaps in your understanding of MCAT-related topics (not everything is on the MCAT so focus on MCAT topics more for some motivation). Use the AAMC topic lists to figure out what's on it and what's not.
If you've already taken the pre-reqs, I'd study a maximum of 5-6 months out. Even that is probably too much. 4 would be a good number.