Dependent Travel Along with Spouse at Same time

Hi All,

I am Aravind , Applied for Single Permit through via my employer. Will get single permit by November 2019 Mostly.
My Employer says they won't process dependent Visa , So I am going to process dependent visa on my own and planning to take my wife and 1 year old child along with me.

May I know how can I process visa externally,
What are the documents required,
What about travel and health insurance for them and how much will it cost for both??,
What will be the overall visa processing cost?

Kindly reply. Thanks in advance.

Discussed many times in existing threads in the forum, Please take time to read through.