My personal placement includes 108, 110 or 111. If I decide to take these courses, do I still need to apply for a place?

Yes. Econ 108, Econ 110 and Econ 111 are limited enrollment courses. Even if your personal placement includes these courses as a suggestion, you still have to apply for a place if you wish to take any of these courses. Since space is limited, not everyone gets their first choice.