You can appear for Patent Agent exam (conducted every year in the month of jan) at chennai, mumbai, delhi & kolkata. For training you can check Origiin LLP (Bindu Sharma).
Trademark Agent exams are conducted in the month of May or June. Exams are very difficult, pass percentage is 4/250 i.e. 1.6%
Feel free to contact me, if you need further details.
Trademark Attorney & IP Lawyer
IP Lex Global Services