Kann ich ein Auto haben
Auto is with capitals, and it's ein cause it's das Auto, not die Auto.
Also, haben goes right at the end. It's the full word (infinitivus) what's usually at the end, exept for when you're talking about multiple people/things.
*Is angry that people aren't participating in the RP'ing*
I won't let you get away with this!
*lighting strikes, a storm rages*
Arghh, aaah.
*Jace is now a SSJ*
Edit:
Or as the Great Deku tree would say...