Doubtful that you will get financial aid, as it appears that your dad makes over $250K per year. I don’t think that your step-dad’s income will count towards your EFC however. How much can your mom pay per year?
Note that for loans, as a first year undergrad you will be limited to $5500 max. Since many of the schools you are applying to probably won’t give you any need-based aid, that leaves a big gap. Thats why some of the posters above were encouraging you to look into colleges that offer merit scholarships. Otherwise you may be accepted to some of these colleges, but they will end up being unaffordable.
For a pre-med, you want to aim for as high of a GPA and MCAT as possible. As long as you get good grades in the science classes, you can major in anything. Being a non-bio major will help you stand out. Going to a smaller liberal arts type school can also help, especially because you’ll get to know your profs better. Being at the top of the class at a smaller college is better than being middle of the pack at a place like state U.
Given all of this, have you considered places like: Loyola Maryland, McDaniel, Scranton, St Joe’s, York, etc. You would probably get a lot of merit aid at these colleges. And you have a decent chance of being at the top of your class.