B.Arch

Hi Ritesh,
Any college requires JEE or NATA scores for admission into B.Arch.

If you need to take admission in IIT, you need to qualify for JEE Mains paper 1.

It is just great that you have thought to study B.Arch at IIT.
You should appear for JEE main paper 2 (B.Arch).
Almost all the coaching centers are good. I don't want to mention any coaching center names. If you want to get into any best institute then refer those which produced the toppers in JEE exams this year or the consecutive years.

Maximum colleges across India considers NATA and JEE Main paper 2 score for admission, so I would suggest you to appear for both the examinations and give your best.

Dear Kajol,
Please go through these link to predict college you can get
Rank predictor : https://www.resonance.ac.in/answer-key-solutions/JEE-Main/2017/jee-main-2017-rank-predictor.php
College predictor : https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

No, but if you want good professional job, you will have to write NATA/JEE, like if a company see your marks regarding the competitive exams, then they will select you. I would suggest you to write JEE/NATA.

I can't tell you about rank, but I think 220+ marks are sufficient to get a good college of architecture.