Trouble getting dealership vehicle entries to show

I purchased the dealership theme for my dad’s used lot. I assigned each vehicle entry I wrote up to a category and assigned those categories to the menu bar. That way I could have cars, trucks, SUVs and vans all under their own pages. However, when I do it that way the vehicles listed (under the cars page, for example), just come up as the names of each car which are clickable to show you a more detailed description along with pics of each. This is illustrated in pic 1 below. However, if I make a page called inventory and then assign all posts to appear under that page then I get an actual vehicle entry of each which shows a little bit of description and a pic of the vehicle to the left side. This is illustrated in pic 2. When you click on that type of entry you are then led over to a fully description of the vehicle just like I mentioned earlier. I want to be able to have the categories all listed on the menu bar, but once you visit that category (again, cars for example) you see not the text only listing, but the latter type of listing I just mentioned. Can anyone help me with this?

Thanks!

Rob

pic 1

pic 2