A "Hunky" was a nickname for Hungarian people used at the time of this film. Mostly it was used in a derogatory manner.
(at around 1h 4 mins) Steve gets off the blanket to leave Betty and go with Jan. As he's walking away, it appears, from the back, that he zips up his pants. This likely was Director Hugo Haas's sly way of getting around the censors yet still indicating that Betty had provided Steve an incentive to do her bidding.
Jan's car is a 1930 Ford Model A Deluxe Phaeton.