in a parking lot doesn't mean a whole lot, but it sounds positive(at least you were not going at high rpms) I'm not sure how to know if you have bent valves other than to take apart the motor. or at least get the head covers off.
you spoke in km. are you in Canada?
Just need to try and move the rockers if they don't move your a $30/40 belt away from it working again. I'd recommend getting the while timing kit, belt, tensioner and water pump. Look on ebay or Amazon they should be around $120