Questions About Minors Travelling

As a minor with dual citizenship, I have been thinking about a few legal questions that I have not found distinct answers to online, so I’d li to ask you all.

1. Would I have to have parental consent to cross the American or Canadian border given that I provide the correct legal documents?

2. Same as question 1, but what about if I didn’t have passports, but I had other legal proof of citizenship, such as a birth certificate?

3. I was born in the United States with a Canadian mom, and therefore a dual citizen at birth. I currently reside in Canada. Am I legally considered an immigrant/emmigrant in either country?