Colleges in Bangalore

Reva Institute of Technology is under government VTU but now it is going to close. And, Reva university is newly opened which is famous for collecting more money for silly things from students.

It depends on what branch and what rank you get in COMEDK and so on. I suggest, you call the college and talk to them once regarding admission.

Considering you have asked in Dayananda Sagar, you can get in to IEM, CTM, Medical Electronics, Chemical, Instrumentation, and automobile and aeronautical engineering.

Hello,
To know which college you might get based on your rank use college predictor:
https://www.shiksha.com/b-tech/resources/comedk-college-predictor

No, it is not. Every year, there are around 20% Freshers in a batch of IIM, Bangalore. And, many of them quite well from landing a good job to acing courses, it just becomes a function of your effort here.

Sorry to be blunt, but it is highly unlikely. There are loads of other great colleges that you should not discount.

CAT is an aptitude exam, and requires that you are able to apply your mind to solve the questions. It is not hard because of the exam itself (which I feel is way easier than all the Engineering and Medical Entrance examinations) rather it is because of the competition. Hence, you will need to put in as much effort as you can to be ahead of others to get a seat in the IIMs
I believe enrolling into a correspondence process will help you kickstart and plan your preparations well. But that is just my opinion. A quick google search will throw a lot more ideas and plans, that you can look at and follow.