Aviation

Most aviation courses offered by different universities require their applicants to have cleared their class 12 exams. My suggestion to you would be to clear your class 12, so that you can apply for popular aviation courses in India. If you have cleared only your class 10 exams, you would qualify to serve as airport ground staff at airports.
Student Pilot License (SPL)
Student Pilot License is a very basic license with which one can actually pilot the aircraft. To acquire Commercial Pilot License, according to DGCA requirements the candidate has to do minimum of 200 hrs of flying training and so to fulfil this requirement, SPL is the very first step which can lead the candidate to a flourishing Commercial Pilot.
Eligibility Criteria:
16 years of Age: The student/ enthusiast/ incumbent will have to provide proof of his age via a School Leaving Certificate/Birth Certificate or Passport
10th Standard Pass: Proof of having successfully completed 10th standard
Regards.

Basic pre-requisites to apply for a commercial pilot course is mentioned below:
1) You must complete Class XII under the 10+2 system or its equivalent with a minimum of 50 per cent marks in maths and physics.
2) You must be at least 16 years of age to be eligible for a Student Pilot License, 17 for a Private Pilot License, and 18 for a Commercial Pilot License.
3) Alternatively, you could directly enroll for the Private Pilot License once you have cleared Class XII and are 17 years old. This involves taking an exam conducted by the Directorate General of Civil Aviation* consisting of theory papers on air navigation, aviation meteorology, air regulation and technical aspects.
4) Your vision in one eye must be perfect. In general medical terminology, it is called 6/6 eyesight. In the other eye, you could have an imperfection of 6/9, which must be correctable to 6/6.
5) General physical fitness is mandatory. You must be free of any disease that can hamper normal function.
6) You need to complete the requisite number of hours, clear written papers and the medical examination. You need 70 percent marks to pass in each of these papers. You can keep appearing until you clear them.
Note: The application form is available at all flying clubs. You can also write to the Directorate General of Civil Aviation. Send a self-addressed envelope, requesting them to send it back to you. Regards.

Aviation and aeronautics both have their basis in flight Science and engineering. Depending on your end goal, one field may be better suited than the other. You should pursue a course which you feel more comfortable studying/doing. Both these courses may have similarities and at the same time are very different from each other. Both are explored in more detail in the following sections.
Aviation Management: Students majoring in aviation can train to be pilots or navigators. Aviation management programs teach you the basics of airport operations that include applications such as aviation law, security issues, aircraft design and weather issues. The Federal Aviation Administration (FAA) and other federal agencies, such as the armed forces, are venues for you to study to become an air traffic controller.
Aerospace engineering: Aeronautic or aerospace engineers can work for government agencies, such as the National Aeronautic and Space Administration (NASA), as flight engineers, designers and members of mission control. Aircraft or weapon manufacturers also hire aeronautic engineers to design airplanes, helicopters, spacecraft, rockets, guidance systems and other defense systems.
Regards.

Nowadays, some airlines have started asking for type rated Candidates on their fleet and certified by DGCA. And on the other hand some others have collaborated with major TRTO's like CAE to train CPL Candidates.
For Type 1 airlines you are required to complete a self sponsored training on any aircraft that is a part of such airline's fleet.
For Type 2 airlines, they hire CPL Candidates and then they are trained by their collaborated TRTO as per the airline's requirements.
You are then to probably fund or self-sponsor your type rating on whatever fleet you are selected in an airline.
Then, you finally get a job as a pilot.
I hope the process is well explained to you.
CPL is an expensive affair. It might cost you around Rs.18-20 Lacs for flying + DGCA exams Rs.500/- each exam + Medicals for Rs.10,000 + endorsements and license issue fees around Rs.25k + Type Rating around Rs.15 Lacs.

Talking of doing CPL and then thinking of doing it at cheap cost are two far ends.
Doing CPL is a costly affair and it requires the candidate to fly actual aircraft and since it is a professional course it should be done under the guidance of experienced and well trained instructors.
You may find cheap flying clubs in Phillipines, many go there to do their CPL training and after returning they convert their license to Indian license.
But there's another fact related to it, that a couple of years ago Phillipines was black listed by DGCA for doing CPL. Although now the restrictions have been lifted off.
Experienced and professional instructors and examiners shall train you to be a good pilot whereas you may just do a formality by doing it from any cheaper institutes.
Decide wisely before you enrol into any flying school and do check it's credibility in DGCA's records.