Australia

You can get admission in Wharton University to pursue MBA in finance.

You can take guidance from a licensed immigration advisor.

You should take IELTS once again, and improve your score. Your score should be at least 6 bands (overall) if you want to get admission in a good college.
If you will opt for any english language course offered by the college, then it will cost you in lakhs. So you should take IELTS again as it will cost you around 12000 rupees.

Your IELTS score is very good but all the other requirements depends upon the specific college where you want to apply. So, please visit the college's website and clear your doubts.

It is not too hard but depends upon many aspects. I would suggest you to ask about it from a licensed immigration adviser.

Choose a course that best suits your interest and aptitude such as Human Resource, Accounting, Finance, or Marketing. I would suggest you to look into the courses offered by University of Sydney, University of Melbourne, Edith Cowan University, Australian National University and Monash University.

Hi Akhil,
The annual income of software engineers in Australia is slightly higher compared to France. However, the cost of living is very high in Australia. If I were you, I would be wise enough to choose France which is an European hub and has a high standard of living. In terms of jobs, both the countries have good opportunities for software professionals.

You have to concentrate on your B.Tech to score high. You should be ready to take TOEFL and GRE exam. You need to score over 310 or above in GRE and over 95 in TOEFL. You can apply for USA or Canada.
USA needs minimum 70% and Canada wants minimum 70% - 75 % in Bachelor degree.
All the best.

NIOS board certification is totally valid for further education, government jobs or private jobs, but for global education you need to check with the particular university for the eligibility criteria. You can contact a study abroad consultant for the same.
All the best