USA

Yes, you can do your Masters in aerospace engineering from USA.

MS/ M.Tech in aeronautical engineering from top USA university or IITs with excellent grading will increase your chances to get a job in NASA.

Hi, USA is the top destination. But destinations like Japan, Korea, Singapore which are regional financial hubs are also popular options for business and finance related studies.

The cost of studies in both countries is relatively same. Australia have more advantage, since it is not as crowded as US. Also, visa policies of US are a little against favor these days. Whereas, Australia needs people for work there. I am not so sure about scholarships.

After compelting your class 12th, you need to write SAT exam. This exam will get you into Bachelor's degree. You can go to each college and check if they have BBA. The college will ask you for SAT and TOEFL/IELTS. So, you need to get a good score in IELTS/TOEFL as well. Once you have these IELTS/TOEFL and SAT, you can write a statement of purpose which is required in every US college.
For MBA, you will need to write GMAT after completion of your Bachelor's, then you can again follow the same process.

It depends on your interest and criteria you have set for university selection. Though, in terms of comparison, I would say that MIT will have an edge over University of Toronto in terms of worldwide rankings.

It will cost around 30 lakh rupees per year.

Hi Preet, please write to studyabroad@shikhsa.com and our counselors will get in touch with you and suggest you universities as per your profile.