SPPB pages are designed to create static content, such as Landing Page and the like. But this is not suitable for a full -fledged catalog.
You can display part of dynamic content on such pages using Articles Addon ( for example) on Home page and the button addon "See all" which refers to the whole catalog on the new page.
At the same time, all your separate pages with cars should be Joomla article pages, but not SPPB pages. And in this case, you should use standard settings in the article for intro image and full image.
To create a full -fledged catalog, you should use Category Blog menu item type