After you've completed six months of studies in Canada, you will qualify to apply for a work permit. Once the work permit has been approved, you will then be able to apply for a SIN.
No, the following school's students can apply for an off campus work permit after 6 months. http://www.cic.gc.ca/english/study/institutions/participants.asp
if a student complete their study in a private college and done his course like ACCA,MBA then after compete study is he can work any department legely????