Australia

Hello,
Please complete your undergraduate degree firstly and if you are aiming for a good university you will require very good scores preferably a first class. Because you would be an international student you must also take the IELTS. I will urge you to visit the university websites for university specific admission requirements.

Dear Manish,
You can do so if you have above 65% in you 12th with science and mathematics, helps if you had a computer science subject but not compulsory and an IELTS score of overall 6.5 with no band less than 6.
The fee structure is semester wise, however you will need to show one year's fees and 2 years living costs which will be roughly around 65,000/- to 70,000/- AUD in your or your parents bank accounts for 6 months balance before applying for the visa. The fee on an average will be 25 to 35 thousand AUD per year depending on the university.

Hi Harman,
It is best if you sit for your GMAT test.
Some Australian universities such as Macquarie University does not list having a GMAT score as one of their admission requirements - they need minimum two years of professional experience
But universities like University of New South Wales and University of Melbourne require a GMAT score. It depends on the university.
Check each university's requirement - and how much is their cut-off score.

Hi,
Complete your Bachelor's degree preferably with a first class. Higher the grades better the chances of admissions in top universities such as Universities of Melbourne and Sydney. Take your IELTS too. An overall score of 6.5 with no section less than 6 is required by most.

Both countries will have some pros and cons. If I were in your place, I'd prefer Canada because:
1) Its proximity to the US.
2) Availability of high paying jobs.
3) Global and recognized universities and curriculum.
4) Canadians are more friendly and welcoming to Indians.
I get positive vibes from Canada. I've not done enough research on Australia to comment.