Admission to MIT Chennai varies for all courses  

For Engineering admissions is based on TNEA scores and centralised counselling is conducted where students are alloted college based on cutoff marks and after successful payment and reservations of seat, admission is granted.

Cutoffs shared below for MIT Chennai. 

https://www.careers360.com/colleges/madras-institute-of-technology-chennai/cut-off

Minimum 50 percent marks in 12th is mandatory .