Hi,
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)
Most institutes have a Pilot Aptitude Test, which a candidate must clear, in order to get selected. The Aptitude test is a 3 stage process, comprising of- written examination, Interview and the Aptitude Test.

Once a candidate completes the training and has the CPL, he/she may apply for job at commercial airlines or charter companies. But possessing CPL is not the end of it! After getting CPL, you may also have to spend money for type rating. Based on the airline that you join and the aircraft you will fly, you will be given specific training (keeping that aircraft in mind). You will be asked to pay expenses of this type rating by the airlines!
This is the complete procedure to apply for Pilot.