SAT

Hi Neha,
You have mixed your exams. TMS would be required.JEE Mains is not acceptable.JEE Advanced is.for Bachelors of Science . Here is an article to give you some insight
https://studyabroad.shiksha.com/cost-of-studying-in-australia-articlepage-556

NO!.
You should have min. 50% marks in 12th standard
and should have given JEE Mains Exam with a non zero and non negative score

If what you seek to study at any US academic institution such as a College/Institute/University is at the undergraduate level then a SAT/ACT and the TOEFL are both mandatory. Consult your desired institutions' website and/or e-mail them. Thanks for the opportunity. Hope this helps!

SAT is taken for entry into bachelor degree programs. To pursue MBA you must take GMAT or GRE.

Hi
SAT is just one part of whole profile so if you are looking for admission in any of the colleges, you need to hv around 1580 and a holistic profile that includes co-curricular activities, community services etc. In addition to SAT subject based SAT for math is also required. Check here.
http://mitadmissions.org/apply/freshman/tests

Yes you can take SAT after state board. There is no restriction or limitation to any education board. Hope it helps.

Hi,
Not really, your admission will depend on the entire profile. You should start preparing with the rest of the application, prepare good personal statements,check university websites, check common app portal through which you will be applying to the universities, get all your documents ready and start applying once you take the SAT. All the best.

If you mean the timeline of application, then applying for the September intake is the best bet for Indian students. To further detail the time of when to apply, here is a guide -
https://studyabroad.shiksha.com/study-in-us-timeline-for-september-2017-intake-guidepage-416

Yes why not if you can.

Dear Praveen, please refer to the collegeboard.org and Khan Academy for most upto date material for SAT test preparation online & is free absolutely. Khan Academy is an official partner of College Board which is the test conducting body.
https://www.khanacademy.org/
https://www.collegeboard.org/