Do I need to send separate envelopes for PR card renewal for my wife and son or can the entire family's application be sent in the same envelope? Also can i pay the fees togather for my wife and my child or do i have to create a separate account for everyone to pay the fees?
You can send the family application in one envelope and pay the fees at one time. I suggest doing a cover letter outlining the contents of the envelope.
I just applied PR renewal yesterday for family, I did that in one envelope with a single fee and printed that for each family member, same I did with my Citizenship application