Well I drove to States every second week with my COPR never any issue. But yes you can;t enter Canada thru any flight.
COPR is good and act as a PR card when you are going or coming back to Canada by private car.
Its around 60days that you will receive your PR card.
You will be able to see changes by 55+ days to you file and you check your status by going to CIC website and linking your PR application.
Fill in the exact info required to link your file.
Usually you can tell them the address like where you wanna receive your PR card. By default they have the one from where you receive your passport at time of passport request.
1. Yes you can. You have around six months to do landing as per the COPR you will receive.
2. yes you can.
3.you don't have ta have financial proof to do landing.
You can find all the information in this forum. Its not a big deal if you cant link your file. Many people can't and they still got their PR card so its all good. check back few pages.
Just fill in the proper information. I was able to link mine in less then 6 hours of landing.
Few people had and have problems linking their application.