Exam

NDA and CPL both tests you to be interpersonal strong. And hence a similar approach is kept in selecting cadets / candidates for them!

First of all, congratulations Abhishek for good score in JEE and 12th also. As per previous year cut-off, you are eligible for the seat in mechanical branch in our college. You must try because have good marks. So, I think you will be selected.
All the best for your future.

Yes, you can get admission in MIT's architecture.

The course of B.Com, plus, all the basis of the subject you wish to do M.Com in, must on be your tips.

Your rank is fine. You can GET a good government college. To GET more insight about the college which you can GET on the basis of your JEE Mains ranking go through the link below -
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign

No, you can not get it as your marks are too less. You should try for other best private colleges. All the best.

IIT JAM exam is for Master degree in any subject.

No
You can't GET admission in B.Arch without NATA. JEE is not required for B.Arch.