NATA

Apart from that, you get a lot of books online, I'll list a few of them:
NATA & B.Arch Question Bank by Ar. Shadan Usmani. NATA & B.Arch complete self-study material: Entrance Examination by Ar. Shadan Usmani. A Complete Self Study Guide for B.Arch by P. K. Mishra. B.Arch Entrance Examination Guide by Surendra Kavimandan.

Hi Lovaraju, Please visit the link below for full details about NATA. Here, you can also find question papers of NATA. https://www.shiksha.com/architecture-planning/exams/nata?q=NATA&rf=searchwidget&landing=ep.

First of all, your JEE Mains score is not sufficient to get admission in a good government college. You can take admission in top private colleges like VIT, SRM, etc.

Hey Sarath,
As Merit List keeps on changing every year (obviously :P ) and It all depends on the combined NATA score and board results. For the year 2017, The Cut off Merit score for Maharashtra Candidates at Sir JJ College of Architecture were as follows:
For General Candidates: 148.46
For SC Candidates: 128.69
For ST Candidates: 116.46
For SBC/OBC Candidates: 150.2
So through this you can easily now see your admission chances
Hope it helps!

Yes, you get a seat at Sathyabhama University.

You can get IITs and NITs.

Bachelor of Architecture (B.Arch) is a 5-year undergraduate program which can be started after 10+2 with a minimum of 50% marks. This course is designed to produce licensed and professional architects who are authorized to do private constructions and government constructions.

Hi,
As per their website, NATA is a must.

Kindly mention your PCM marks.