IIM Ahmedabad - Indian Institute of Management

Your score of 60% would prove as a detriment factor for your IIM A call. Aim for colleges like FMS which do not five any weight-age to your past acads for admitting students.

You might not! Your 12th score would prove as a detriment factor for an IIM A call.

I would not be able to clarify your question regarding IIM L, but for IIM A, converts usually have 94-95+ percentile.

It is difficult with your academics. But with such a percentile getting admission for FMS would be easy for you. I would recommend you to apply for FMS next year.

First, you have to go through CAT. For more information, visit www.iimcat.ac and also www.iima.ac

Yes, of course. But resume is considered for eligibility. Your resume should be strong with your perfect score. First 50 rankers get called from all IIMs.

You have a decent profile and especially you have a great chance at C & L as they put relatively less weightage on your graduation score.

Depends on your year's admission criteria (check the past statistics, a quick google search will throw up the result). But, I believe you should focus on CAT and think about this once you have crossed that hurdle. All the best.

IIM's I would say aren't the end of the world and you can very well reach similar or greater heights in your career despite the IIM tag. You can look at other Indian MBA B - Schools or Foreign B-Schools, that don't give as much weightage to 10th and 12th percentage like ISB.
Also, I would say it is important that you introspect a bit about your career and look for ways to progress where your past profile would not be a hurdle.

There is no minimum score as such (B has >80% criteria, might have changed so do check)
Put in your best effort for CAT, all this comes later, and you anyway can't change your scores.