CBSE 12th

By using Shiksha's prediction link, you will find that you will get IIMs with this score or not.

Please check your eligibility to apply for admission to Bachelor of Physiotherapy in Sanskriti University from the criteria mentioned below:
Minimum Eligibility to Apply to this course is that candidate should have a minimum pass mark of 50% in class 12th with mandatory subjects : Physics, Chemistry, Biology. Admission is based on the marks obtained in 10+2. Interested candidates can apply online/ offline with the required information.
Regards.

If you just want to start preparing for CS then you don't need your class 12th result right in your hand but, yes as you are wishing to give those exams, you should have your result with you.

Top MBA colleges in India accepting MAT are mentioned at the link provided below. This ranking is based on rankings published by The Week, Business Today and National Institutional Ranking Framework (MHRD).
(Note: This list contains both public and private schools).
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-mat/2-2-0-0-306

As your marks are just average, getting into very good college would be a challenge. You must decide what stream you would like to pursue and then choose a college. If I know your dream stream then I can guide you further.

Yes, percentage matters for SPP colleges, but you may get admission if you have enough IELTS band and 1% is not a big issue. Get a good consultant.

You take some coaching and write IELTS exam. You can apply to university with your PUC mark sheet and IELTS mark sheet. You can register on Shiksha itself if you want to study in Canada.