You will have to apply for a visa, which is quite easy to get.
No, a Mexican citizen cannot travel to Mexico without a passport.
No, a US citizen cannot travel internationally without a passport.
umm by a plane
Not if you are a US citizen. If you are a citizen of the country, you can travel to any place part of the country without a passport.
Yes, US citizens can travel to certain countries without a visa.
Yes, if you are a U.S. citizen, you can travel to Florida without a passport as it is a domestic destination within the United States.
You don't need a passport to travel within the continental United States, even if you are not a citizen.
Andaman and nikobar
You can if you are a US Citizen and are entering from the US.
Yes, a U.S. citizen can be denied entry into a country without a passport, as passports are typically required for international travel and entry into most countries.
Yes, a US citizen can travel to Germany.
Yes, they can because Slovakia is part of European Union and Schenghen too.