At my school, there are 7 pre-reqs. English composition, lifespan psych (pre-req: psych 100), intro to chem, microbiology (pre-req: intro to biology), A&P 1 and A&P 2, statistics (if tested into college level.. I didn't, so I had to take some remedial math classes), and then a "strongly recommended" class, cross cultural medicine. Also, it is required to hold a CNA at time of application, so there is that class, too.
I will be applying in spring of 2015, so I have just around 1.5 years left of pre-reqs. This is because I will be taking only 1-2 pre-reqs per quarter. So, it will probably be right about 2-3 years total in working on pre-reqs.