If you want to save money, don't catch a taxi from the airport to your accommodation - take a local mini bus if you arrive at a reasonable hour that is.  If you catch  a taxi  they may take other passengers and charge each the same $20 (1500 vatu) to get from the airport to accommodation.  You quickly learnt that the local mini bus will cost about $1.50 or (150 Vatu) including luggage.  The international airport is right next door to the domestic one so if there are no mini buses at international try the domestic.  


Mini buses usually make multiple stops.  There are cheaper ways to see Vanuatu and on the island of Efate, car hire is worthwhile for one day as that is all it will take to drive around and you can take your time.  Stop at the pretty beaches like Eton beach without the bus loads of tourists too.