Pilot

Generally for freshers it's 36.

Once confirmed with the necessary endorsement, commercial pilots are paid handsomely. Entry-level pilots can earn up to Rs 1.5 Lacs per month with domestic airlines and even higher on international routes. Senior pilots can earn in the vicinity of Rs 5 Lacs upwards per month.

You would have to join as a trainee pilot with an airline.

Hello Moumi Dey,
It is very nice indeed to hear from you that you are interested in becoming commercial pilot. The basic eligibility is 12th with PCM that you obviously have. There is no upper age limit. However to help you I am attaching a link that will give you all the required information about eligibility and all other related issues.
http://igrua.gov.in/Aboutus.htm

Hello S Ram, I can understand and appriciate your desire to become pilot. However eligibility for flying schools 8s 12th with PCM. Unfortunately you do not have this. However I am attaching a link of one of the best flying schools of India. You can get in touch with them to know if they can offer you any exemption. http://igrua.gov.in/Aboutus.htm
Best wishes for your dreams of becoming pilot.

I must at the outset state that, its a very good decision that you are taking. Basic eligibility for joining an academy to get trained as a commercial pilot is class 12th. I am attaching a link to a sample aviation academy in Thiruvananthpuram. Go through it to know about intricacies etc.
http://www.rajivgandhiacademyforaviationtechnology.org/
Best wishes to your dreams.

Hello Amrity S. Its very nice to hear from you that you are interested in becoming a pilot. Rajiv Gandhi Institute in Thiruvananthapuram is indeed a very good choice. I am attaching a link that will give you all the required information about this institute. http://www.rajivgandhiacademyforaviationtechnology.org/index.php?option=com_content&view=article&id=48&Itemid=55.html
Best wishes for your dreams of becoming a pilot.

The CPL training eligibility requires you to have maths as a subject for admission. Therefore, it would be a good idea to pursue maths.

The candidate must have cleared 10+2 Science stream schooling with Physics and Mathematics as the main subjects (age of candidate should not be less than 17 years when the course starts).
* Non Science stream students may pursue the required subjects through NIOS. NIOS schooling can be used to meet the above mentioned requirements. Apart from NIOS, non Science stream students may also pursue the required subjects as private candidates from their respective state boards too!
* The minimum marks required is 50% (may vary from Institute to Institute) aggregate marks.