Wheel color was black except on deluxe trucks which would be body color. 15" wheels have no stripes, and 16" wheels would have 3 pinstripes, again only on body color wheels. A good reference is the Vehicle Info kit here:
Vehicle Info Kits.
I've seen original big bolts with the belt line pin stripe. So I would say yes on #2.
Interior color in 1949 was all the same, no matter what the exterior color is, a grey/brown semi-metallic, with maroon seats.
