Mark,
Thank you for your business first of all. Sorry for the trouble too. The home page template is the one you’re looking for if you’d like to have your site set up like the demo. The full-page template is made to be like a basic inside page that instead of having a sidebar for widgets, it has an extra-wide content area. That can be useful for some types of content that need more room like calendars.
If you switch back to the “Home” page template you should be able to see your slideshow and widgets there.
You can run WordPress locally if you’d like to. It’s a great option while you’re developing your site. Here are some links to get you started with that:
Installing WordPress on a Mac
Installing WordPress on Windows
If you have any questions or trouble, let me know.
Enjoy your week,
Bill