Concealer can be used to add a dead pastey appeal to your face, eye shadow and liner can be used around your cheeks, eyes, etc. to exagerate your natural features and give a sunken feeling.
As for clothing go to the Goodwill or find an old, plain shirt, button ups work the best in my opinion but whatever floats your boat. Rip it around some seams,cuffs neck etc., and use black paint around the very edges and then dark red around the rest. Use the tip of a broken pencil if you dont have a paint brush, works just as well for this purpose. Then just find a pair of old or washed out pants and shoes and you have your attire down