Regarding the pics- just search google for "toby sweeney" on the image search.
Regarding the character- don't look too deeply into him. Realize that fact that he is, after all, crazy. Most of them are. At the came time, don't create a characature of a crazy person. He needs some depth, but not too much.
"I am ready to disclaim my opinion, even of yesterday, even of 10 minutes ago, because all opinions are relative. One lives in a field of influences, one is influenced by everyone one meets, everything is an exchange of influences, all opinions are derivative. Once you deal a new deck of cards, you've got a new deck of cards."
— Peter Brook