What courses should you take in high school if you plan to be a pharmacist?
Obviously, any courses required by whatever college you plan to attend. If it's available, take some AP chemistry and any of the biological sciences would be good. Organic chemistry would be good, but most highschools don't offer that.
In general, you just need to focus on getting into the college for now. Keep your grades up and make sure you take the math, science, english, foreign language and any other classes required by the college of your choice. Ask them for a list of requirements. Most are more than willing to work with you. You may even be able to get that information from the internet.