No!
No of course not. You don't need a passport to travel within one federal country!
If you are a US citizen, you will need both a valid US passport and an Australian ETA visa to travel to Australia.
When traveling from Puerto Rico to Florida, no passport is needed. Puerto Rico is part of the US, as is Florida. Traveling from Puerto Rico to Florida is travel within the United States. Citizens do not need a passport to travel within the US, although they do need some form of government-issued photo identification to get on a commercial airplane and a passport will serve that function. Non-citizens who are in Puerto Rico have already entered the US using a passport (or similar document for Canadians) and so need only the identification they would need to travel within the US, for example, from Miami to Atlanta, to travel to Florida or other locations in the US.
Key West is a city in Florida. Provided you are a U.S. citizen, you do not need a passport.
No, they would not.
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 do not need a passport to travel from Wisconsin to Florida. If you are flying, you need government-issued photo ID, but a state drivers license or state ID card will work just fine.
No. The travel is within the same country and does not cross international borders.
Yes, you need a passport to travel to Europe.
Yes, you need a passport to travel to Paris.
You need a passport