A little clarification could help, ie. are you a Korean in RSK looking to get into an australian course via a student visa?
If so, the immigration web site section -
Vocational Education and Training - Students - Visas & Immigration , the appropriate visa - VET? under eligibility/english language indicate you need to contact the educating organisation (meaning requirements can vary).
You'll note that there will be quite a few more requirements to be met by both educating organisation - TAFE college and yourself.
If you are already in Australia and have residency rights, then you ought to just contact what TAFE college you may be considering re their courses.