CAT Eligibility

Cracking CAT and all other competitive exam is not that difficult but not that easy first prepare plan for what you want to do and how you will achieve it then start with the tasks related to the plan define priorities so preparation for CAT requires already 9 months if basic concepts are claw then 6 months including solving practice papers so do not worry, concentrate on what you have and then kick start for the new task.

Yes, you are eligible for CAT, if you are -
Final year / pre-final year or graduates can sit for CAT.
Minimum 50% is required in graduation.
For reference check the link-https://www.shiksha.com/mba/exams/cat

Yes, you can appear in the final year of graduation.

Yes, you are eligible for CAT, though your class 10th & 12th score will pose a problem in every college as most of the colleges including IIMs are now making profile based calls.

Yes, you are eligible to appear for CAT.

Going to the tuition for CAT examination centers will surely help.

You will eligible for CAT in last year of graduation or after passing bachelor degree for that you need to score more than 50% in your bachelors.
All the best.