Hello
To make available the demo template styles as kindly listed by Arconis you will need to install the 'Demo Installer' included with your download. This is a copy of Joomla with the template demo content included as part of the sample data. Details on installing the demo installer can be found at the following URL...
http://www.joomla51.com/tutorials/item/setting-up-the-demo-installer
Alternatively you can simply set up your template styles as showing in the following screenshot. A copy of this screenshot can be found in the 'Template Extras' folder of your download.
Ciarán