CBSE 10th

Yes, u can get a good college in 78%

It depends on company criteria as topmost company most of the time do the filtration while campus recruitment i. e. eligibility criteria above 60% overall, till graduation. But it's all about your skills and qualities you possess. If you have all those skills and knowledge that they want then obviously they will select you.

No, I don't think so. You can only do it after passing class 12th.

Graduation is possible without the formal study of 10+2 from distance learning mode like from IGNOU subjected to passing the BPP exam. Bu, for LLB you needs to complete class 12th also. So, you cannot study the LLB without passing class 12th exam.

Fees varies from college to college, please specify the college, so that I can help you.

Eligibility:
Candidate must have passed Diploma/ Graduation from a recognized board/ college/ university.
Or,
Candidate must have passed 10+2 from a recognized board and must have 2 years of working experience.
Or,
Candidate must have secured minimum 60% marks in Fire and Safety 6 months course (only for students studying under Continuing Education Program of Government Polytechnic, Mumbai).

Hello Samiksha,
That depends on your graduation results rather than on 10 or 12th, so work hard in coming years. For further information, you can refer to the link below:
https://www.shiksha.com/college/iim-Ahmedabad-indian-institute-of-management-iima-vastrapur-307/admission
All the best.

Commerce is the best if you are good in creative work and if you can think big.