Truth about SM ent,JYP ent,YG ent,etc...?

i'm 17 years old and i'm planning to go to korea and audition to these entertainments,and i'm good at dancing,singing,rapping.and i only know english and tagalog language,is that ok? and i'm in my 4th year high school now,do i have to go to college first before auditioning? am i too old to audition? i'm pretty and all but i don't talk alot but when performing i do my best,is it true that they don't provide you a money for food?(like jokwon said)? do other ents. like woolim,pledis,cube,starship,star empire,etc will pay for your expenses when you become a trainee???