Why "auto" in English is never accepted? All dictionaries know it as well as people understand =)
The Czech word "který" mean "which", not "what kind of".
The interrogative "which" asks you to specify one out of several, or one from a list of items, and so on.
In contrast "what kind of" asks you to describe the nature or properties or characteristics of something.
Which orange do you want? The one in your left hand.
What kind of orange do you want? A big, juicy one.