No.
NO
No, but double check with the coach operator.
He/She will need an ID of some sort, but not specifically a passport.
Do u need a passport from scotland via dunegal going by ferry
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.
No
yes
unfortunately you do
No.