What Courses do I need to become a math Physicist?

Do you mean something like mathematical physicist, or theoretical physicist? I'll warn you now you'll have a hard time finding a job with that degree; experimental physicists are far more employable. Anyway, you'll need a PhD in physics for that. A double major in physics and math in college would be good, but physics is more important than math. High school doesn't really matter; take all the math and lab science you can. You'll also need excellent reading, writing, and public speaking skills. You'd make 16k - 25k a year in grad school (grad schools in the science pay you to study), 35k - 55k a year for the next 2-6 years in postdoc positions, then 40k - 100k a year starting salary as a physicist somewhere (colleges and universities pay less, but are the more competitive positions - you'd have about a 1 in 5 chance of becoming a professor somewhere).