JEE Main Scores

You have to apply through TNEA 2018 for getting Admission in Anna University. There is a different quota for Non-Tamil Nadu State Students. More details about TNEA 2018 is on the link below.
https://www.shiksha.com/university/anna-university/exams/tnea
https://tnea.ac.in/adata/index.php
Apply for TNEA and sit for Counselling. More details are on Anna University's Website.
https://www.annauniv.edu/
You can also call or email them for more details. Number below is contact number of Anna University.
044 2235 1126
All the Best.!

No, you need to qualify NATA to get admission in this college for architecture.

Yes, you are eligible for this college because it's a private college. JECRC college is the best but the university is also good.

For mechanical branch it was around 500-1000 state merit rank. For comps it was around 1600-1800 and for IT elex ExTC it was around 3000-3500 till CAP2 with percentile of around 96. If you have patience then i will suggest to wait till CAP3 ie. Counselling round as cutoff there was around 6000 for comps and 11000 state merit rank for IT. So if you have less score then keep calm and wait till CAP3. You will easily get into the college you want.

Yes, there are full chances of getting CSE in NITs. You must have to participate in counselling of JEE. Only after counselling, we will get to know about fees concession.

Bro, I suggest you to take admission in any one of your nearest colleges. And do hard work in the computer field that is, learn programming languages and try to make projects based on them. After some time, you will get to know about how companies are doing their work.

Sorry, but you will not be able to get into Nirma Unversity with these marks. Though the selection is dynamic and dependent upon the students applying for it and hence changes every year, still the cutoff for CSE/IT is around 2k and the least non-technical branches is around 80k.

There are good chances for getting a government seat.

You can look for state engineering colleges accepting JEE Mains score. If you want to pursue engineering from IITs/NITs only than you can also go for one more attempt (if its your first attempt). If you want to do engineering than go for a state engineering institute and work hard. You can try for GATE and again look for IITs/NITs to complete your M.Tech. Just be determined towards your goal. Best of Luck!

As your rank is not good enough to get such colleges which is best for CSE through JOSAA.
Go to such colleges which offer their own test and counselling for admission.