If you're already looking into Javascript, I would recommend jQuery for practical reasons, and Node.js for more subversive reasons. Have a look at source of some common Node.js modules via github. This may lead onto finding out a bit more about lisp ideas.. and computer science topics that are both interesting and relevant.
Maybe at 16 you have time to work on a startup idea in your spare time for fun, while doing a degree also? Id actually suggest a course on compilers, it helps you write better programs. Throw in a bit of C programming on unix, and the basic stuff on algorithm complexity.. and calculus and.. oh dear.. just follow your interests :]
Theres so much cool stuff to find out about. University might be the best place to concentrate on hacking code and meeting interesting people, one of which might be the perfect cofounder for your startup.
Many of the teachers will be so-so.. but then you'll find one or two gems that really show you something you might not have found on your own - to be challenged is important.. seek it out.