Exam

You can just easily get previous year question papers of both JEE Mains as well as advance on various sites. Just go on Google and type for previous years Mains paper you will get the papers easliy with solutions also.

Firstly, you have to give JEE advanced to get an admission in any of the IIT

Yes, you might get and seat in your home state NIT or any other Eastern NIT or NIT Jammu.

No, you cannot be eligible for JEE Advanced by this much percentile you need to score more percentile in order to eligible for JEE Advanced you must know focus on the upcoming Mains in April to get a good score and be eligible for JEE Advanced.

You can get admission in NIT Trichy easily but your branch could play a major role in it. Last years' cutoff for CSE was 1178 and your rank must be in the range of 1300 to get an admission. So wait for the counselling.

You have an very the lowest score in JEE Mains 2020 firstly you have an option to give examination again in April so try to score more and more marks as to get a good college other than this you can check out the link given below to get a good college based on your marks click the link below to know more-
https://www.shiksha.com/college-predictor

Firstly, congratulations for getting a good percentile in Mains you can get any medium or low NIT respective of your marks. You can get NIT of your hometown, or Eastern side NIT or NIT Jammu NIT Kurukshetra etc.

Yes, you can get NIT in your home state, or any other eastern NIT or NIT Jammu.

No, you cannot get CSE branch in any of the NITs with 85 percentile. But, as per as your caste category you can get any other branch depending on the cutoff in any NIT.

It is not possible to get admission in NIT Surathkal with 93.5 percentile. You need to score more than 98 percentile in JEE mains to get NIT Suratkal.