Queries Participated

Change of name

Dear Experts,

I'm From Bangalore, I Need to change my second name.
Pls help me with below queries.

1.How many days it takes to complete the whole process?
2.What is the charge for whole process?
3.How can i apply to change my name in DL/Aadhar & Voter ID?
4. Should i change my name in my educational documents also?
5.How can i apply for passport in new name.

Thanks,
Nayan Kumar.