MBA Entrance Exam

Yes, you need to give your graduation marksheets. You can get all the information regarding CAT on the official website www.iimcat.ac.in

It does not matter how much you have scored in graduation. I would recommend you to prepare and give CAT exam. If not 90 percentile, even if you score 70 percentile also, there are many good MBA colleges you can take admission. If possible, you can also give other MBA exams like MAT, CMAT, XAT, SNAP, IIFT, NMAT, etc.

Yes, you can apply. ISME requires any entrance exam score. If you have not given any still just give it a try.

Yes, you can definitely for PGDM course as the requirement of scores for the various colleges is distributed along as 50% + grades in 10th, 12th and graduation and a good MAT score. So, I would suggest you to prepare well for the MAT exam and definitely look forward for your preferred opportunities.

I would say IES is better than MET and Chetana.

You can refer the link below:
https://www.shiksha.com/mba/colleges/mba-colleges-accepting-atma-india?uaf[]=location&ts=8320490&rf=filters&ct[]=174&ex[]=9180&ed[]=et_20

You have to fill the online application form. The payment options are given there. It can be paid online. So, fill all the details in the form and go for it.

Yes, of course you can and if you have good cat score than your academic record and overall personality, communication skills and knowledge will be main point to get the seat in good B-school.