Engineering

No. Since the top colleges of Pune take students on the basis of MHTCET, you need to mention those marks if you have given it. Moreover, with the above-mentioned marks in JEE Mains, you'll not be able to get a good private college which stands for a position on a national level.

Below is the link to official cutoff marks for GRIET branch-wise. Kindly make the decision accordingly.
http://www.griet.ac.in/eamcet.html

It depends upon your choice. If you can handle the pressure and study the syllabus with the same dedication that you studied for two years before, then you can take it. Moreover, you need to work very hard as you mentioned you have very less marks in Mains this year.
Also, you can take admissions in

Hi Tapas, given below is the college predictor link which would solve all your queries -
https://www.shiksha.com/b-tech/resources/wbjee-college-predictor
Good luck.

The admissions are purely on the basis of JEE Advanced. There is a fixed date for the application of IIST out of a limited number of seats, a merit list is prepared and the students are allotted the colleges for admission. Your Mains marks are of no use for admissions in it.

yes you can get this college at this rank but not gov you can only get private average colleges

Some of the top colleges for B.Tech and engineering are:
SGSITS
IET (DAVV)
IPS
IIST
Medicaps
Vaishnav Institute of Science and Technology
MIST etc.

Hello, hope you are doing well. No you are not eligible for NIT in architecture with 35146 rank.
Go for government college you will definitely get one. Else Nirma University, Symbiosis, IPS Indore, CEPT University, MS university are some good colleges for architecture you can also take admission in t