Dear Mirza Saheb
I have some practical info thru my experience but the sad part is that I don't read the laws/regulations.
After you are done with interview. They wait for your background check and in the meantime you are asked to do the medicals.
To get the visa, you must be clean on security issues (no criminal history etc.) and your whole family must be medically fit (including you).
You must submit the Police Clearance Certificate (PCC) from each country you had lived for atleast 6 months (including India) to CIC.
Once they receive all these documents/certificates, they will ask you for your Passports (the whole family) and issue you the Visa on each Passport. They will also issue you "Confirmation of Permanent Resident" (COPR) document.
Once you get the Visa and the COPR document, you & your family must land in Canada before the expiry of the Visa.
If your family is not here during the Passport Request by CIC, then getting your family's passport thru courier/mail to you might be a problem, if they are checked by the customs. This is considered illegal in some countries.
If your family returns back from India before the date issued by the CIC for visa issuance, then you all can get the visa altogether.
I don't know which country you are residing presently.
Ask PMM, he is the chief. He might guide you better.
PMM pls respond
Thanks
Shabab