Colleges in Gujarat

Yes you're surely eligible. You can get details on cutoff and admission process below.
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653

If you score between 96 to 99.5 percentile you have decent chances. Please check detailed cutoff below.
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653

Minimum of Rs 14 lakhs per annum and maximum of Rs 21 lakhs per annum for agribusiness management. For details please visit:
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653

Admissions will be made on the basis of percentile/score in CAT-2016/GMAT, performance in academic writing test (AWT) and personal interview, academic (10th,12thand Graduation), co-curricular and extra-curricular achievements, and work experience. Start preparing by giving more mock exams.

Yes you can get into IIM Ahmedabad if you score well between 95-99 percentile.
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653

For general category you need GMAT score of 720+ and for CAT you need 97-99 percentile.
Please vist below link for details:
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653

Hi,
You need 19.5 lakhs for total 2-year PGP program exclusive of food cost. You can check breakup of fees below:
https://www.shiksha.com/mba/course/post-graduate-program-management-indian-institute-management-iim-a/1653

IIMs offer general management course which encloses courses in the areas of accounting and finance, behavioral science, communication, economics, information technology, marketing, personnel management and industrial relations, operations management, law, strategy and quantitative methods.

Please check eligibility below.
Candidate must have completed graduation with at least 50% marks or equivalent CGPA (45% for SC/ST/PWD/DA) from a recognized University Final year student can also apply .Must have obtained valid percentile/score in CAT-2016/GMAT (at least 700) not before December 15, 2014(Overseas Indian candidates)
Note - It is mandatory for a final year student, who is provisionally admitted, to submit the mark sheet and degree certificate of the final year bachelors degree examination held on' or before June 30, 2017.

Ordinary students when show extraordinary efforts, they definitely can do well at IIMs. All you need is dedicated handwork and passion to prove your mettle and worth.