Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
No, you cannot use SCSS variables in your codebase inside the Acquia Cohesion interface.
To use an SCSS variable, enter your chosen variable into the appropriate CSS property.
Google maps may not be showing if you have not set a Google maps API key.
HTML is escaped when using Drupal tokens in Site studio as a security measure, this follows Drupal core.