Where would you be if your coordinates were Madurai - 625011?

Subramaniapuram.

What was the original title of the movie ABCD?

ABCDE.

Which raga connects the James Vasanthan song Kangal Irandaal & the Illayaraja song Chinna Kannan Azhaikiraan?

Rithi Gowla. A nice post on the raga here.