Colleges in Karaikudi

The bar council has removed age limit for the course but you have 40% marks which is 5% lower than the required percentage. Try doing it from an open university. If you don't get admission, then you either you will have to do another master/bachelor course or a 5 year LLB on the basis of your class 12th percentage.

Use this
https://www.shiksha.com/mba/tancet-exam-cutoff

If you are from a reserved category, then yes, you can apply for admission here but if not, you are not eligible. Minimum eligibility for admission in PG courses is 50% in Bachelors degree in relevant subject.
For details regarding last date and fees, please refer to the link given below
https://www.shiksha.com/university/alagappa-university-karaikudi-23417/admission

The minimum required cutoff to join is 68%.