Search for Geocoding and click on Geocoding API -> Enable API.
Do the same thing for Geolocating too.
As for the items not showing up, currently this Menu item is set to show only 1 specific category. Each of your menu items is set to a different category. In the menu item settings for the church-finder page, either set it to show ALL Categories (default), or make sure to select all the desired categories you'd like shown on the page.
Regarding Language translations (i.e. Postal Code vs Zip Code), you can make these changes easily in the Joomla language Overrides in the Admin area, or visit our FAQ for more details on how to update.