Taxis run at all times of the day. Usually one will take a Taxi out of the Huanchaco when returning home because luggage takes up too much room in a combi. A taxi driver will usually charge one 8 to 13 soles to take you to the bus station in Trujillo, depending on the time of the day. The airport is closer so it may cost 6 or 7 soles.
From Trujillo one would travel to Lima, then to whatever destination she or he wishes.
The bus ride to Lima is between US$7 & US$27, the flight, about US$80.