IIM

Mostly, the global rankings on most of the websites cannot be trusted as such.
The one which I will use is the Financial Times Global MBA rankings which seem to be a reliable source.
The good news is that the top three IIMs managed to secure positions in Top 100.
You will be surprised to know that the top among Indian Universities is not and IIM but is the Indian School of Business (ISB).
According to the 2017 rankings ISB ranks 27th while IIM Ahmedabad ranks 29th. But for 2016 IIM A was at 24th position while ISB was at 29th.
IIM Bangalore ranks at 49th position I.e. way below ISB and IIM A.
Then IIM Calcutta just manages to make a cut at 95th position.
Actually speaking, the ranking system takes in account many factors which work against Indian universities. For example research is given a lot of importance in the rankings but as we know our colleges don't pay much heed to research part. There is some good research going on but it is very limited.
But, if you want to work in India after MBA, IIMs are a really good choice and as a matter of fact offer better ROI as compared to foreign universities.
All the best.

It highly depends on your goals and your financial status.
If you are getting top three IIMs then don't think twice. Just go for it. Even if the fees are high the returns are also really good.
Only two three IIMs after IIM Ahmedabad, Bangalore and Calcutta are worth the fees they charge.
IIM Indore and Kozhikode are also pretty good. The newer IIMs aren't comparable to the top ones.
You can also consider ISB (Indian School of Business). It is also comparable to top three IIMs.
If you aren't getting top three IIMs and ISB then go for good private universities.
The top ones are -
XLRI Xavier School of Management, Jamshedpur
Management Development Institute, Gurgaon
SP Jain Institute of Management and Research, Mumbai
TA Pai Management Institute, Manipal
Institute of Management Technology, Ghaziabad
You can also consider top IITs ( which offer MBA).
The priority should be top three IIMs, ISB, IITs then IIM Indore/Kozhikode or top private universities like XLRI or MDI.
The decision between IIM Indore/Kozhikode and private universities should be taken considering factors like location, fees and the cutoffs as such.
You can refer the list of top MBA colleges in India here
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india/2-2-0-0-0
All the best!

The CFA Institute provides the following breakdown of the most common professions:
5% Relationship Manager.
16% Research Analyst.
7% Chief Executive.
7% Consultant.
5% Corporate Financial Analyst.
5% Financial Advisor.
23% Portfolio Manager.
6% Risk Manager.
Jobs after MBA Finance.
Accounting Manager.
Chief Financial Officers.
Cash Managers.
Manager Consultants.
Investment Banking Associates.
Credit Managers & Specialists.
Financial Analyst.
Corporate Controllers.
Both the qualifications will be like jam and butter on the bread.
The average salary can be expected somewhere around 15-25 lakhs per annum. It will although, require a lot of hard work. However, it will be a dream come true.