What should I do about taking money from my father, who is in need of it now; should I tell him that I do not need it and give it away as charity, or should I continue taking it and giving it away as charity?

If taking money from your father does not displease him, then continue to take it from him and give it in charity on his behalf. If he is in need of money, you can meet his needs indirectly. However, if taking money from him would displease your father, then do not take it, and seek another way to help him.