Yes, as long as you don't have any standing warrants or are actively sought by the authorities. In these cases, you may and will be deported back to the United States.
Yes, they do.
No
does a citizen of Mexico need a passport to go from the us to Mexico and back? He is legal to be in us but not a us citizen.
Sure, if you have a Canadian passport you will surely do.
Yes.
Yes, a US citizen can travel to Germany.
No. Both are in the United States. You do not need a passport to travel from state to state.
I am a us citizen since I was born 17 years ago in the us as a us citizen in Oroville, CA.
Since your dad is a citizen, I think you are too. You will need to prove it since you were born in Mexico.
Canadian, American and European citizens can enter Mexico without additional requirements other than their passports.
No, a US citizen cannot travel internationally without a passport.
Yes, a US citizen needs a visa to travel to Russia.