Vellore

Hello
Among VIT, Vellore and Thapar University, I will suggest you to pursue thapar university, because CSE of this university is good enough, and placement record for CSE is also good.

You have to give entrance exam of the university i.e.,VITEEE.

1) VIT Vellore
2) RV College
3) VIT Chennai.

VIT is a prestigious institution. It offers varied courses and the placement at VIT is also very good. It is ranked amongst the top institutes in India.

VIT can offer good research paperwork by which you can publish your own work but I don't think many people do research. The same research work happens in MIT also but the numbers are a bit less. If coming to the placement and facilities MIT has an upper hand.

If you are seeking admission in an engineering college then I would like to suggest VIT as the first preference. It is one of the most reputed private colleges after BITS-Pilani. It is the best option in every context whether it is the environment, placement, fest, exposure or anything else. It is far better than Dharmadas J. Sanghavi College. One thing, you have to adjust as it is far away. Now, it's up to you, but first of all, you have to clear its entrance exam.
Good luck.