Should I email the admissions office of colleges I want to get into about application requirements?

No, first you should check their websites and see if your questions are answered there. Look under "admissions" -- it should tell you which courses are recommended or required and whether they require standardized test scores and which exams they prefer. Then look up the profile of their most recent freshman class -- it should tell you the racial/ethnic makeup of the class, their average SAT scores, and other relevant information. If you still have additional questions, then you can email the admissions office. Keep in mind that it takes more than just grades to get into these schools -- they'll want to see leadership in your extracurriculars, too.