I personally found high school algebra to have been sufficient in preparing me for calculus in college. HOWEVER, algebra is the foundation of calculus, therefore you should feel confident in the basic algebraic skills....which only translates into a happier experience in calc.
Statistics, at least business statistics, and/or lower division or a select group of upper division statstics does not prepare one for calculus. I found most of the math I learned (especially calculus) virtually useless when I took a undergrad stats course. However algebra comes into more play if you take a graduate level stats course.
In regards to physics, schools usually offer two flavors of physics. Calc-based and non-Calc-based. I personally found calc-based physics easier since I can see why things happens, rather than given an equation and assume this is the way it is. Really taking one or the other probably won't impact how you do in med school or on the MCAT. But the question is what do you want out of your education? As the saying goes, Biology is Chemistry, Chemistry is Physics, and Physics is Calculus (err..math). Hope that helps 🙂