College Entrance Exams in the Philippines for the SY 2012-2013?

I really don't have any idea about college life, yet I want to be prepared . I'll be in my senior year this June and I'm from a not-so-known city in Mindanao. Do you think I could go to popular universities like UP, ADMU, DLSU, UST and etc. ? How? When and where will the entrance exams be? Any other infos will help . Thanks :))