The 1st, 3rd and 4th questions are answered by Stick_Rudder...
2) Normally how many days does it take to get an appointment for a fresh initial Class I medical exam at-
Air Officer Commanding
IAM IAF
Vimanpura
Bangalore 560017
----> After u send them a request for an appointment, they will revert back to u within 7-10 WORKING DAYS.. You can get an appointment minimum by 3-4 weeks from the date of your request letter.. And if you select a date post 1 month, you stand a chance of getting the date what you prefer..
But believe me, getting your INITIAL exam done at this center is a huge pain in the ass..You will have to run around for 3-4 days to get all the tests done.. You will have an initial feeling that its Air Force, so its all gonna be systematic.. But trust me, by the time u finish your Class 1, u would have grown weak, both physically and mentally!!!!