IIM Ahmedabad - Indian Institute of Management

Yes there are scholarships both at central and state levels.Moreover there are financial institutions to offer study loans .What one requires is hard work and get good job soon after degree and IIMs have the repo for the same.The loan can be easily paid back.

You may go for CAT using Career Launcher's study material, and appear its test series too.
it is much good enough.

Dear Himanshu,
If you manages to score good somewhat around 99% in CAT and considering your past academics you will most probably get call from IIM-AHM.but for admission they will consider other things as well.such as your social activities , social life, skills, communications, etc.
All the very best

You seem to be on the average side for an ST candidate. Given your performance, I would guess the range to be between 90 percentile to 97 percentile. To be on the safer side, you should aim for higher percentile 99.99. Please note that the cutoffs change every year and it is impossible to guess the cutoff. Hence put in your best foot forward.

Every has its own importance and scope. Your skills and academic performance can help you get good job with a good salary.
All the best

you need to score around 99 to 100 percentile on CAT.

No, you will not get any exemption from CAT. For all candidates aspiring to be join IIM, CAT is a must.

To get into MBA course you will need to appear for the entrance exam. You can appear for it this year and then apply to different colleges. Unfortunately there is no other way to get into business schools in India(atleast for a fresher).

Chances are high, but you shall be needing a good GDPI score and keep your graduation average score at above 75%. High cgances of converting IIMs, but you should be well versed with current affairs and management knowledge.