hii...!!! 

for taking admission in law school in Tamil Nadu you have to qualify CLAT and AILET and some of the universities conduct their own admission entrance test.

and i would like to suggest you the names of the top law colleges of Tamil Nadu and they are as follows:

• National Law School
• Government Law College, Madurai
• Dr. Ambedkar Government Law College
• SRM university Chennai
• Central Law College, Salem

i hope this serves your query, Good luck