IIM Indore - Indian Institute of Management

Please see the website of the institute

Dear Sumit,
Basically prepare yourself in such a way that the interviewer should feel you feel you are worth deserving the course.
Prepare yourself on current events, subjects you like most, hobbies and most important you need to be confident in presenting the same.
I have shared few links for your help,
Regards,
Arun Dev

you should write CAT first

Just inform the admission office of the institute and they will take care of the same.

Post graduation diploma in management

Yes, but your final selection depends on how much weightage given to your undergrad component. If it is quite high, it would be difficult to get into IIM.

I am not aware of changes. I think you can better look at the college website to arrive at a correct estimation.

Depends on which field you would like to go like marketing, finance, consulting etc.

There is no exact number which I am aware of, however a good number gets package crossing 20 lacs .

Not really, placements have been 100% for the college and there won't be a problem unless you are in bottom 50 of the batch.