Of course they did. The entire "free" world benefited from the industrial mobilization of the US during the War. Trade with Canada improved, and with the post-WWII housing boom we bought many things from Canada including machinery and, most visibly, timber to frame all of the new houses with. This is a very simplistic answer so I suggest that you look further into Canada's history. By the way, during the War Canada supplied the US with war material.
The population of Canada during WW1 was 8 million.
Yes, Income tax was introduced to Canada during World War 1. It was introduced to help pay for the costs of everything needed for the war.
Yes, Canada suffered through the Great Depression during the 1930s. This was after World War I but before World War II.
how did the government finance world war one
METAL
Armaments
during WW2, there was no trade between Japan and the US
London, then Canada.
food and gas....
NOTHING
i do not know what your talging about