Yes, as a US permanent resident, you can travel to Canada.
Yes, a US permanent resident needs an Electronic Travel Authorization (eTA) to visit Canada.
Yes, but you have to have your passport
Yes you can.
Assuming you're not a permanent resident in Canada - you would file a USA tax statement.
Yes if you have a Permanent Resident card; however, if you do not have a Permanent Resident card you would need to apply for a visa in advance.
You are able to. I was a permanent resident with a green card( actually pink) and i went to Mexico and Canada with it.
Yes, a US resident can travel to Canada.
no, only us citizen can help for permanent resident
yes
Yes, a US permanent resident can travel to Japan. They will need to obtain a visa before traveling to Japan.
Yes. A Canadian can work in Canada, it makes no difference that he or she has permission to work elsewhere.