Engineering Entrance Exam

You can't get NITs colleges at this percentile But you get some colleges which are better and Those colleges take admission on JEE Mains percentile/rank. I am sending you an authentic link of college predictor from where you can check which colleges are you getting at your percentile and you are able to select. Please check it out. link-https://www.shiksha.com/engineering/jee-main-college-predictor.

For getting admission in vit you need to write it's entrance exam it doesn't consider 12 boards grade.

Yes getting 260 marks in J. E. E is sufficient for you also you belongs to home state so there is no problem regarding this __ALL THE BEST.

No There is no chance of getting NITs at this percentile.

No, you have to go for the counselling process. Few steps we have to do in it. Firstly we have to register for counselling then we have to fill choices of Branches and colleges then after that you get allotted colleges and branches on the basis of rank. This is a similar way of process which happens also for B.Tech courses counselling in NITs. If you want to know more in detail then I am sending you an authentic link from where you can get all information about the counselling process. Please check it out. link-https://www.shiksha.com/engineering/gate-exam-counselling.

If you belongs to trichy or tamilnadu you might get IT or ICT in sastra thanjavur campus but if you belongs to other states it would be difficult for you to get into IT or ICT also it depend in counselling _ALL THE BEST.