CAT

As compared to the previous year, the chances of conversion are there. Also, depends on how you performed in the Group Exercise and the PI.

To get a call from TSM, 70 percentile above score in cat is required. However, TSM also considers the scores of CMAT / MAT/TANCET scores. These exams are comparatively easier to score well.

You have good chances for a call, but conversion depends on many more factors including your academics, work experience, GD & PI performance. So, start preparing yourself.

Scholarship depends on your percentile in your entrance exams & majorly on college. You can also show them your sports achievements if you do have. It's an add on to the plate.

https://www.shiksha.com/mba/articles/how-to-prepare-for-cat-blogId-19617 will help in preparation tips, apart from that the admission depends on the CAT score.

Any top B School might not give you admission as your class 10th and class 12th percentages are very low. You can still try giving CAT ,MAT, ZAT any many such exams and as per the percentile, you can decide the college whichever takes you in.

Yes, this is possible. The maximum weightage are given to CAT PI and components and these components contributes more than 65% in selection of a candidate. Hence, you scored well in CAT PI, and that can make it possible.

I think, you would get a call for GD-PI, but you need to perform well in GD-PI.

Quantitative Aptitude:
How to Prepare for Quantitative Aptitude for the CAT by Arun Sharma
Data Interpretation & Logical Reasoning:
The Pearson Guide to Verbal Ability and Logical Reasoning for the CAT by Nisiht Sinha
Verbal Ability:
How to Prepare for Verbal Ability and Reading Comprehension for the CAT by Arun Sharma
Logical Reasoning:
How to Prepare for Logical Reasoning for the CAT by Arun Sharma
English preparation Books:
Word Power Made Easy by Norman Lewis.

Hi Rakesh, given the fact that you have scores in 70s in class X and XII, this might act as a deterrence for getting calls from IIM despite 3 years of work experience. But, that can be compensated, if you have a great cat score (more than 99 percentile).