there is no law against it, weather and road conditions would be the deciding factors.
About 30 or so hours from Toronto to Corner Brook... another 8 hours to drive to St. John's... you have to take the ferry
Google Maps estiimates the driving time as 48 minutes.
You can drive to Switzerland from most countries in Europe. You can't drive there from Great Britain but if you put your car on the train which goes through the channel tunnel, or on a car ferry,...
No.