Passport Required - Yes
Currency - Pound Sterling
Public Transportation - Excellent - Edinburgh has Trams, Buses, and Taxis. We were able to get around primarily on foot in Edinburgh. We took the public transportation when we went from the airport to downtown and when we took the small bus tour to Stirling Castle and Loch Lomond. For more info relating to transportation see the link below.
https://www.introducingedinburgh.com/transport
Explorer Pass - The Historic Scotland Explorer Pass is a great offering if you plan to visit Edinburgh Castle and Stirling Castle. The pass includes 78 locations but the savings start when you visit 3-4 locations. See more information regarding the pass below.
https://www.historicenvironment.scot/visit-a-place/explorer-passes/