CBSE 12th

As you do not have PCM at +12 stage you are not eligible to become Pilot in IAF through NDA. You are eligible to join as an airmen in non Technical steam in IAF.

You can join after your graduation only. For NDA IAF you need to have PCM in class 12th. After graduation, you can apply for different entries such as AFCAT CDSE, NCC ENTRY.

I can't say if it is final round or not, but yes one round is on 12th.

Yes it is possible at some universities like LPU.

B.Tech, Design, Agriculture, Fashion etc. Can all get you high packages, you need to SEE your interest.

Yes you can apply again.

Yes you can, in many schools you need to clear state TET or CTET. It will be good for private schools if you have good presentation skills as online classes are in these days.

There are two ways for getting B.Tech admission in COEP Pune. The first one is MHT CET and JEE Main is another one. The major admission in B.E. Courses in COEP are based on MHT CET conducted by State common entrance cell Maharashtra. As per the eligibility criteria, candidate has passed 12th with PCM with minimum 50% of marks if subjects taken together for general category. So please visit http://cetcell.mahacet.org/ for further details.