for easy kills, you must have been attacked or attack something at least once before turning the option on. the damage function is created once you actually have recieved or create damage.
for gold option, press I to look at gold, press capture gold option, then press I to leave and then I to come back and press the option key.
for XP, press C to see the XP, press the capture XP option, then press C to leave and then C to come back and press the option key.
i've tested it here on multiple saves and etc.
regarding the durability and health options, i can look at this option further, but the suggestion to turn the options off while not needed is good advice for now.
I have no suggestions other than the above.
best,
Cal
Tried to do gold exactly as you said Cal, didn't seem to work. Also tried the merchant suggestion mentioned above, didn't work either. W8.1 64, Steam version of the game, Hero edition.