Get the free shuttle from the hilton to narita town.Go up through the train station and straight out to the main road.Turn right and walk down the hill to the temple.It is a little over a mile I guess but could easily be done in a morning.
Food is expensive in Japan but the restaurants in Narita town are about the cheapest you will find-2 or 3 have suikiyaki for about $US12.
There are tours of surrounding areas but have not done these.Visit
www.naritasan.or.jp to get some ideas.