Engineering Entrance Exam

I'd suggest against taking up engineering if you're not sure of what you want to do, because it's a rat race out there, and you'll regret it later. I'd suggest you choose between the other two.

Try for private colleges which accept 12th scores like CGC Landran, Chitkara, Bhai Gurdas, etc.

Sorry to say but it's difficult for you to get a good government college at this rank. If your rank was under 1500 ST category then you would have chances to get a government college.

Hello,
Your rank is far beyond to get any government college via WBJEE, however check here to get more insights:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Kindly visit the link mentioned below:
https://www.shiksha.com/wbjee-college-predictor

No, you won't be able to get mechanical engineering at Thapar University but if you are interested in MBA also you can get dual mechanical degrees at Thapar University.

Hello,
Scholarships in MIT are need-based that is offered basis your financial background. Quite obviously you will be considered for a scholarship once you have been shortlisted and you will need an extraordinary profile to be considered. IIT JEE Advanced is not even required. You must take the SAT

OOP languages all are important. Each language has its own features. But C+ has all features of Java. But, Java does not support some features of C+.