MBA/PGDM

Yes, the first year for all specialisation is same in MBA. If there is trimester pattern then 1st 2 trimesters are same and from 3rd trimester you have the specialisation subjects.

CAT is the only exam that gives you admission in Iims Prepare hard for it and make sure your curriculum Percentages should be good and if you have job experience then its a plus side for Iims and side by side prepare for GD/PI.

TIME provides a fairly long duration courses. It also provides short duration courses of a few months. But more than duration of the course, the quality of coaching is very important. I was earlier with TIME for more than 9 years. It was a really good institute then However, I no longer work with TIME. I have left TIME, with two other brilliant faculty members Duney and Pravin. We together have started an Institute called SPARK EDUCATION SERVICES, and for CAT 2017 we have got many students who have scored above 98.5 percentile.

First of all, I recommend you to try to prefer CSE over IT. If you don't like maths, have some creativity ( Good for Web Development ), don't like to read and write a lot, love technologies and most important - want to pursue careen in private sector (government jobs are very rare), then welcome. Here you will get advantage of MBA too.
Good luck.

If you do CA, make sure you have B.Com degree. That will have you a push in market. But if accounting is not your Forte then don't even think about CA. Go for MBA. For getting into IIM, you need to score high in CA. Exams. Before attempting go for coaching for atleast 1 and a half years.

AIMS Institutes, Bangalore. Eligibility for MBA Program: The prospective applicant must satisfy one of the following eligibility criteria for admissions to the MBA programme. A graduate degree under 10+2+3 or 10+2+4 pattern under any discipline, securing at least 50% marks in aggregate, from a recognized university.