Narvik is a city in Norway.
Narvik is the terminus of the Malmbanan railway line from the Swedish towns of Kiruna, Gällivare, Boden and Luleå, from where you can continue on towards Stockholm or the Finnish border. Narvik has no connections to the rest of the Norwegian rail network that ends at Fauske, 150 km south of Narvik. One can travel from Fauske to Narvik by bus  . The trip is quite scenic and takes about 5 hours.
Narvik is a compact city which is easy to navigate. Tourist info and ferry harbor are on the main street, and the railway station is easy to find as well.
If flying in from Oslo Gardemoen to Harstad-Evenes airport west of Narvik, a one-hour bus transit is available right to the town centre.
War Memorial Museum, Cablecar to the top of Fagernesfjellet
There are lots of shops and kiosks on the main street, plus there is one big department store right near the railway station. You'll get everything you need from there.
The ferry to Svolvaer in Lofoten leaves the harbor at 15:00. It's a small boat so be there in good time. You can't book tickets in advance - you will pay (350NOK, 167 if you have ScanRail) once you're on board.