-5 DGCA papers for a single engine endorsement and one more if you wish to endorse multi. and one RT. as I said do some research you'll find more info. online... It will be helpful as you'll get into the habit of finding it yourself first n if not satisfied asking on forum.. (I use to stand for hours outside DGCA under the sun to get into the DGCA and able to speak to some officer who could help me... those were the days when entry use to be from main gate when there was no reception)
-it will take around 3-4 months if you take all the subject head-on in one go. try clearing 2 papers in one attempt that'll be a sane idea. clearing 2-3 papers would reduce some burned on your head and you'll get confidence also that I have done these many papers I can do rest also.
-again I suggest finish your papers first.. this is where ppl get struck flying is the most easy part hard part is funds
and papers...
-you have to dedicate time for flying probably have to take a leave from job.