If I transfer my Keychain folder to another MacBook Pro - open it with keychain access, would I be able to see it? Basically want to take my Keychain folder (from old Macbook) onto a new MacBook Pro, then open the login.keychain on the new MacBook, which ideally would show my iCould, system keychain, system roots too, correct?
Yes. After copying the keychain folder and you can open it with the Keychain app. Which prompts a pop up that is asking for your password.