I think your car is fine. It certainly would not hurt to have the valve cover gasket addressed while you are under the period warranty though. It will only get worse and your car will begin to consume/leak more and more oil down the road.
While the substance on the hood, fenders and front brace does look dubious, I'd be willing to bet your dealer is right in that some form of anti-corrosion agent was liberally applied. To me it looks like cosmoline and although visually unappealing, it shouldn't really hurt anything.
Good luck and enjoy your new ride.