Exam

BIMM, ISBS, etc., are really good colleges which can give you admission with this score.

You are eligible, but as your cut-off is low, you cannot get top colleges. Try the below link to find the suitable colleges:
http://cutoff.annauniversitycounselling.com
Good luck.

You can't decide anything with your marks, you should know about your interest. And your interest should be your engineering branch although if you are pass with 50%+ then you can take admission in any branch of B.Tech but you have to approach private colleges so please choose wisely as per your int

Yes, you can directly opt for B.Tech in CS in any private college, some colleges are listed below, do check them:
MIT College of Engineering, Pune
Lovely Professional University, Phagwara
Marathwada Institute of Technology, Bulandshahr
VIIT College of Technology and Management, Bulandshahr
Brahmanand Gro

If you take one, it will be enough. This exam is to prove your English proficiency to study abroad. IELTS is written directly by hand and TOEFL is an online exam. Whatever is convenient for, you can do it. Any of them is enough for you to study abroad.

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.

Hi Kundan,
There are few chances for you to get DTU or NSIT.
Wait for JAC counselling.

One can, but Arihant's JMI MBA entrance exam book is the best option. In it, one can get the content and as well as 3-4 years question papers too.

You won't get the best college but may get a decent college with non-core branches. I would suggest you work hard for your 4 years to get success in your life. Visit Shiksha's college predictor to get better exposure on colleges and branches.
All the best.