The problem with what you want, and I am sure you do, is COLOR pictures. The problem is they are probably non-existant, since color pictures were rare back then. I have only seen black and white photos. They do not give the details you want. Compound that with the fact these trucks were made in many different factories, and it seems standardization of minor details did not exist then. But of the things you asked, the running boards were black, underhood accessories, almost all black, inner grille bars, those were either "waldorf white" (color number is lost forever) or silver gray, depending on who you ask. Interior bits, most were same color as cab interior. Ask about something specific.
I have never seen a cream medium truck. I am curious how it would look. Cream medium is too yellowish for me.