The question marks in your signature; do they mean that you might be using this 6" LCD as the display for your car PC? If yes, then you would need an LCD VGA controller, touch screen controller, and a backlight controller. These three controllers could not only be quite expensive but also kind of challenging to locate. If you are not familiar with what those controllers are then do a search for them. There are tons of information on them in this forum.
Also, looks like that LCD module has a Hirose connector for the connection to the VGA controller; it is very difficult to find a seller/supplier for that Hirose connector/cable-connector combination.