One question although I have no background in this profession but how would Canadian law focussed Paralegal training help in any way on your return to India at the end of such a course ? Just saying but that might be the first challenge in stating your purpose in studying in Canada how this would adapt to being a paralegal in India if that is your chosen career direction. Also you do not state your current level of qualification.
Assuming this would be a full time course then generally people can work 20 hours per week off campus with a study permit, this would be stated with any approval.
Permit processing times can be found on the CIC website
Note Cestar College is a private college so unlikely to qualify for a post grad work permit