What does your property manager say/ I'd start listing it as unfurnished, then see what sort of response/rent you get. Investigate the furnished option down the track.
Note, usually furnished places get more rent, but are on shorter leases, and can be vacant for long periods. I'd suggest for your first IP to start with a boring old unfurnished rental. Do some research on serviced rentals for the next one if thats what interests you.
Note, if you rent it with an appliance, you then have to take responsibility for repair and maintence of the appliance as well.