Ontario

Lambton is a public polytechnic. Polytechnics do not offer degrees like MS, you can pursue them from universities usually. So Lambton does not offer MS. Please check the source of your information for correction.

Hello,
You may look for colleges under SPP, they require a minimum of 50%. You must also take the IELTS. Having said that getting through is very competitive since the education standards in Canada is quite high and strict. Please check the entry requirements thoroughly on college websites before applying. Popular colleges you can check would include Algonquin College, Centennial College of Applied Arts & Technology, Conestoga College, Durham College, Fanshawe College of Applied Arts & Technology, Humber College, etc., all located in either Toronto or Ontario.

Hello, typically it's on the higher side. Around 75% marks is required for most programs. You may check here basis the desired program of study
http://www.future.utoronto.ca/apply/requirements

Hi, Please check here:
https://www.utoronto.ca/academics/programs-directory

Hi,
If you get into some big names like IIM or ISB then India. Even business schools like XLRI, etc. are good but not other mushrooming so called private schools. In the latter case choose a SPP college instead and gain some work experience in Canada via post study work option before coming back to India.