LLB

The colleges' website can show you the exact fees.

Yes, it's good. It all depends upon your hard work and communication skills.

Yes, the age limit is 35 years.

BA LLB is a good option as you would be getting a professional degree and it will help you with the preparation of IAS exam.

As you completed your class 12th with Commerce Stream, you can apply for direct Five years LLB programme after completing class 12th Commerce. Or, you can apply for B.Com LL.B, because it helps you to prepare for various GST related problems.

LLB - Bachelor of Law, a three years Law Degree course which can be pursed after Graduation in any stream. The eligible candidate must be an Indian National having completed Graduation in any stream with minimum of 40% marks from a recognized University within the age of 30 years. Some top Institutions conduct entrance exam like CLAT for admission to LLB. Others conduct admission on the basis of marks secured in Graduation Level. All the best.

Do it in English medium, as some laws are only easy explained in English and it would be tough translating the whole thing in Hindi with the meaning of it changing. And, you can practice anywhere in India with English language.

Yes, you can start preparing as its always better to save time. It's a good decision to start preparing side by side.