NATA

No, it is not mandatory to write TANATA if you have already qualified in NATA. It is just another option you have at your disposal.

There are number of colleges where you can apply for B.Arch by using the score card. You need to visit the website for the details most of the time they do mention the score acceptance. Following are the colleges:
ABIT Group Institutions, Odisha
Bharati Vidyapeeth Deemed University, Maharashtra
Lovely Professional University, Jalandhar
Birla Institute of Technology, Mesra
BGS School of Architecture and Planning, Bangalore
SASTRA University, Thanjavur I would suggest you Lovely Professional University, Jalandhar, as they do provide scholarship also. http://www.lpu.in/programmes/bachelor-of-architecture.

Hi Archan,
Yes, you may get admission for B.Arch in Sir J.J College of Architecture as per your NATA Score.
All the Best!

If you are from Delhi or have done your high school from Delhi, then it will be easy for you to get a seat there.
You may get a seat if you are from outside Delhi too but there are only 6-7 seats in here. But you may try for the counselling.

You can surely try for their counselling.

Chandigarh University accepts your JEE score, and it is quite possible, you can get admission there.

You can try for CEPT-Ahmedabad or MS University-Baroda.

With NATA marks, you can surely try some government colleges, but with your JEE marks, there are no chances for admission as 176 is a below par score in JEE paper 2.

You are eligible for the admission process in Chandigarh University.
Thanks and visit www.cuchd.in

Yes, with the above mentioned marks you will get into VCOA.