Engineering

Use rank predictor to get a rough idea of your rank and percentile.
https://www.shiksha.com/b-tech/resources/jee-main-rank-predictor
Then, use the college predictor to know about the colleges:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Hello Himanshi, yes indeed. For admissions into bio related engineering courses taking biology in 12th is perfectly acceptable. However, there are some institutions that have mandated maths and physics as compulsory and choice between chemistry or biology. Hence, you need to check before applying.
B

Yes, you can choose this depends on your NEET rank.

Yes, you can easily get admission in NIT College with this score. But, you should try for the other good college like SPA Ahmedabad, NID and other private colleges as your score is quite good.

Getting all this under this limited space is not possible and also there admission details at the same time is somewhat looks like impossible for anyone but then also I can tell you that in almost all the districts of UP and Rajasthan, you can find an engineering college and in all the colleges the

Total fees for B.Tech lateral entry in DTU is INR 2.97 Lacs.

Visit the link below :
https://www.shiksha.com/b-tech/colleges/b-tech-in-aerospace-engineering-colleges-Bangalore.

Yes, JNU offers B.Tech course.

Go through the link below :
https://www.shiksha.com/b-tech/ranking/top-computer-science-engineering-colleges-in-orissa/46-2-119-0-0.

Refer this link : https://www.shiksha.com/college/psg-college-of-technology-psgct-coimbatore-19398/admission