It is recommended that you make a couple of changes to the WordPress settings, and you will also need to remove the default widgets from the sidebars before you start working with the theme. It doesn't matter if you make these changes before or after you have installed and activated the Scouting Challenge theme.
Changing WordPress settings
It has to be assumed that you have already installed WordPress. Once you have done so it is recommended that you change a couple of the settings.
It is strongly recommended that you turn on 'Pretty Permalinks'. All posts, pages and attachments in WordPress have a unique ID and they can be accessed by simply adding
?p=<ID> to the WordPress root URL. That isn't terribly user friendly and it is strongly advised to go into Settings in the admin menu, choose Permalinks and then something like 'Month and name'. It doesn't really matter which one you choose as long as it isn't the default form mentioned previously. Although all the options offered show different forms of permalink for posts they will also enable the page hierarchy so you get things like
You may also find it useful to change the location where media files are uploaded. The default is to load them into month and year based folders but that's not particularly useful when the aim is create a website rather than a blog. So again in the Settings menu there is a Media entry and in there you can turn that feature off.
Removing default widgets
WordPress is designed to do something useful 'out of the box' and to achieve this it may install a number of its default widgets into sidebars. This is fine when you are using the default theme but when you activate the Scouting Challenge theme they will be inherited and that certainly isn't fine.
Exactly which widgets are installed where seems likely to vary with WordPress releases but with WordPress 3.9.1 they are all installed in one sidebar and this seems to equate to the 'Header Right' sidebar when the Scouting Challenge theme is activated.
These will need removing by going to the WordPress admin menu and choosing Appearance and then Widgets. The stray widgets then need dragging out of the sidebar(s).