Thanks a lot...can you please suggest me the best consulting agency I can contact with for my PR visa.
If you want good advice, then work with a Canadian immigration lawyer and not an agency. This forum is paid for by a good Canadian immigration lawyer. Click on the "Campbell Cohen" at the top of the screen to find their contact information.
It is impossible for you to migrate with your entire family of four people. If you are not willing to be separated, then you should forget about coming to Canada. Again, there is no way you can all migrate together. It's impossible.