NATA Scores

Go and visit their official website, and from there you can easily understand the procedure of their counselling from registration to the documents verification.

Yes, of course. You are eligible for architecture. This score is enough for admission to architecture campuses.

Yes, you can get a seat in the same campus. The chances are very high. This score is more than enough for the campus.

NATA score is considered.

It's around 1.5-2 lacs for a year.

No, you have to crack the entrance exam conducted by Anna University.

You can check your chances of getting a good government college from this link.
https://www.shiksha.com/architecture-planning/colleges/b-arch-colleges-india

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

Hi Samriddhi,
It's a good score to apply. You should apply and take a chance. You can apply through All India Seats.

Though your marks are almost around MANIT B.Arch, you'll likely to get admission in second round possibly with hoem state quota.
Some recommedations are:
NIT-Bhopal, Calicut, Hamirpur, Jaipur, Nagpur, Patna, Raipur, Rourkela, Trichy, Kozhikode, Vnit. SPA - Vijayawada, Bhopal, Delhi, Bhopal. Mizoram University, Aizwal and IIEST Shibpur.