Colleges in Ahmedabad

You can try for GLS Ahmedabad, because NIRMA considers CLAT scores.

You can either go for Nirma University or GLS College. Find which one suits you better.

Hi Mridul, it is difficult to suggest or predict any colleges since the merit lists are not yet out. You can check the list below for the college specific entry requirements for an idea
https://www.shiksha.com/accounting-commerce/colleges/b-com-colleges-india

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.

St. Kabir is the best institute for professional studies.
They give perfect knowledge and always do creative event for expanding our skills. For better future, go with SKIPS.

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.

Yes, but you need to perform well in GD-PI too.