@erin: That tiger images are from The Featured Slider. By default, Demo Featured Slider will be loaded and will show that tigers sliding.
In Adventurous Free theme, you have Featured Slider type as “Post Slider or Category Slider. So, first you need to create Post and assign featured image in your post. Then go to “Appearance => Theme Options => Featured Slider => Slider Options” and in “Select Slider Type”, you can select either Post Slider or Category Slider. If you choose post slider, then you need to add in Post ID in “Appearance => Theme Options => Featured Slider => Features Post Slider Options”. See this video screencast http://catchthemes.com/blog/videos-blog/video-series-adding-featured-post-slider/ and if you choose category slider, then you need to select the category from “Appearance => Theme Options => Featured Slider => Features Category Slider Options”. For more check out theme instructions page at http://catchthemes.com/theme-instructions/adventurous/
Note: In pro version you have more features, for that check out theme instruction of adventurous pr at http://catchthemes.com/theme-instructions/adventurous-pro/