Find below response:
1) How to reach these places by train and by flight from Tiruchirappalli,Tamilnadu
Ans: You may base Aurangabad Airport for flights and/ or base at Jalgaon/ Aurangabad for journey by Railways. Refers railways website for detailed trains availability.
2) What is the entrance fee for these caves
3) Which is the best season (month) to visit that place
Refer Caves info section for details
4) Any Maharashtra government tourist buses are available to visit from the airport / railway station and please inform the fare and time schedule of vehicles.
Ans: There are private tour buses from Aurangabad to Ajanta wherein MTDC buses are available from Fardapur.
5) Any specific rules to follow
Ans: Refer Caves info section for details