NIT

University of Engineering & Management (UEM) under IEM group. Students passing out from IEM and UEM are all having 1-2 job offers. They are working all over the world in top positions. They are working in Microsoft, Google, Oracle, Honeywell, IBM research, INTEL and all top multinational companies.
Govt of India, MHRD, NIRF
has ranked IEM group as 3rd in Bengal after IIT Kharagpur and NIT Durgapur. The top 4 of Bengal within 100 in order are:-
1) IIT Kharagpur
2) NIT Durgapur
3) IEM Kolkata
4) IIEST Shibpur (Formerly BESU)

yes you can give jee main again.'Two' attempts are valid.If you preapare well,you may get in IITs.

Yes you can easily get in the NITs in south like NIT Warangal, NIT Trichy, NIT Surathkal. This score is more than enough.

If you belongs to OBC Cat, scores are good for you. You may get one NIT

Your score may not be enough for NITs as your JEE Mains score falls on the border line.

Probably No. Your JEE Mains score is not enough for NITs if you belongs to general category.

I depends on which NITS you are referring! cuz some of them are good than thapar so u should choose wisely just check below link
http://m.timesofindia.com/tech/slideshow/technologycolleges/10-Tech-colleges-that-got-best-placements-in-10/itslideshowviewall/7029610.cms

yes u will but u may not get branch of ur choice

nit and vit r at par one being private while other govt