Colleges in Canada

Hi Pramukh,
Since this is a university specific information, please drop an email to them and inquire about the internship opportunities, career assistance, and outcomes. Try to connect with alumni and university representatives. Also, refer to the link mentioned below:
http://www.tru.ca/programs/workstudy.html

11th grade marks do not matter. Work hard in 12th as its marks actually matter. Also, start preparing for IELTS exam from British Council. It is an English proficiency exam and its result is valued all over the world. Please refer to the link.
https://www.britishcouncil.in/exam/ielts

Most business schools will ask for GMAT+ TOEFL/IELTS scores as admission criteria.You must check the school website to make sure you prepare accordingly.

Yes, please appear for GRE and TOEFL. c

It is advisable to go for BBA.

It is a good university. The kind of jobs you get after the course totally depends on you, since there is no concept of campus hiring in Canada. You will have to look for a job on your own through your network.

If you are going for a UG course, you must get LOR from your counselor or principal. If you are going for a PG course, you must try taking an LOR from your UG college's head of department, or your employer if you have worked. Having a strong LOR is a great addition to the profile.

You should apply with an application drafted in a better way. Without knowing exactly why they rejected your application and without reviewing it giving any advice would be wrong. Just remember you must show interest, and give good reasoning for your course and university choice. Your application should reflect that you want to gain knowledge, and don't want to stay in Canada after studies.

Please mention which specialization you wish to pursue for your Masters. Most universities don't give admission to students with scores less than mentioned. So you can write to the university and ask them if your profile is eligible or not.