DDD He's such a weirdo.
Foundation is basically a liquid, powder or cream product that provides a base color to skin. It evens skin tone, can hide imperfections if its a full coverage foundation. The tone and undertone can help make your skin more "perfect."
Changing your skin tone with foundation is possible, but it might
look fakeóblending a liquid or cream and setting with powder should help. It seems mainly your neck, hands and arms will be seen. To cover that much, something body paint or a theatre foundation might work best. I think most would recommend body paint, so take what I say on it as the holy grail lol.
As to eyeshadow, its a powder or cream product that enhances the eyes with color. ^_^ Can be used as blush, lip color (depends on the formula) or to set a liquid or cream product. He looks sleep deprived but I guess when you're running from a psychotic AI that runs your entire facility, you'll lose sleep. Creating slight bags under the eyes can be achieved with matte purple, very light grey. Schizophrenia is a hell of a disorder. Oh, being that he's so gaunt, you'll want to carve out your cheeks to make them look more hollow.
One method to create more beard hair (and eyebrow hair) has been to take a small eyeliner brush, an angled brush, and eyeshadow that matches the hair then making tiny lines. Liquid brow pens can work too. A bit of crepe hair, the hair made for faux beards, might work to beef up your beard.