If you are entering the United Kingdom, then you need a passport, and this passport is valid for Scotland.
Not if you start your journey in the UK.
Yes
NO
Yes, Scotland is out side of the U.S.
No, you do not need a passport just a form of photo ID.
no
this question doesn't make sense as Scotland is in the UK. If you mean "do you need a passport to travel between England and Scotland" then the answer is no. Unless you are flying, in which case you will need some form of photo ID such as a passport or driving license.
yes
unfortunately you do
No.
Absolutely not.
No, for domestic flights, you will need a form of photographic ID, not necessarily a passport.
Yes
Of course. You will need a valid passport.