Assisting in evil

Q: Please tell if it is permissible to buy things like razor for your father or another elder, who uses it for shaving their beard? Also, like they ask you to go and buy remote control for TV or like batteries for the remote control etc. Should we act upon their (such) commands?

Listening to one's parents

Q: I like a girl and want to marry her but my father doesn't want ... Once my elder sister and her husband went to her home for rishta and they agreed but when the girl's father told to us that our father must also come for rishta with relatives, my father did not agree to go to her home. Please give me a wazifa so that my father will agree.