You are only allowed to ask one question on enotes and so I have edited your question accordingly. Tolerance, which is what I will focus on in the response to your question, means putting up with somebody. If you tolerate somebody you are able to get along with them. Tolerance is a very interesting concept to explore in this novel, because actually it is Timothy that shows the most tolerance. He puts up with a selfish, spoiled and racist young white boy and shows great patience and fortitude in working with him. One of the best examples you could use would be in Chapter Nine, when Timothy is trying to gently get Philip to help making mats by weaving palm fibres. When Philip tries and is unable to do it, he lashes out verbally at Timothy:
I tried again, but it didn't work. I stood up, three the palm fibres at him, and screamed, "You ugly black man! I won't do it! You're stupid, you can't even spell...."
Although Timothy slaps him, he then next minute gently helps Philip to master the task and shows incredible tolerance in continuing to look after someone who insults him so badly.