To reach TTTI from the airport, take a prepaid taxi (from inside the arrival lounge) to TTTI, Taramani Road, near Tidel Park. This should cost a little under Rs 300.
To reach TTTI from Chennai Central railway station, take a prepaid autorickshaw to TTTI, Taramani Road, near Tidel Park. This should cost a little above Rs 100.
More adventurous people can try the suburban trains, but they run infrequently and only on weekdays (Mon-Fri).
There are also city buses (1 cut) from Central station to Tiruvanmiyur. You should get down at Jayanthi Signal, the stop just before Tiruvanmiyur. From there TTTI is about a kilometre away (see the map). There is an infrequent bus (5C) from Central station (you have to cross the road in front of the station to get to the bus stop) to Taramani which gets you right to TTTI.
IMSc is a long walk (about a kilometre and a half) away. We will be arranging vehicles to pick up and drop participants immediately before and after the course timings. More details will be available when you arrive.
The TTTI Security staff will be able to guide you to the guest house
and the room allotted to you, any time you arrive.
You will NOT have to pay for accommodation. A canteen serves coffee/tea, breakfast and dinner (veg/non-veg) at reasonable rates. But the course organization will provide these for you at the IMSc guest house (without your having to pay for these meals).