What is the ruling on taking a sum of money and two cars that a Muslim won from a festival, and disposing of them for charitable purposes?

If the questioner paid money to participate in the competition, this is a prohibited form of gambling, and he is not permitted to own the prize. Rather, he should spend it on general Muslim welfare or give it to the poor and needy, including his friend if he is poor. However, if he did not pay money to participate, then he is allowed to take the prize and own it.