Car dealer websites will just about always have inventory on the homepage. Whether it's just a search box or some sort of featured area. With the CarDealerPress plugin you have some choices. Here is a quick video on how to use our slider shortcode and VMS widget.
Note: I am using Genesis (framework) and Dyanmik (child theme) as my WordPress theme in this video. The 'EZ' widget areas come from those, not the CarDealerPress plugin. The theme you use should have it's own widget areas for the home page.