+1 on the oil/filter.
They'll be fine even if it takes you a while to get to 600 miles.
Even if they were put in, there should be no degradation in fluids from sitting on the floor for those months - especially indoors, except maybe from the gas, and even that's somewhat overblown. Gas tends to stay "fresh" for longer than you may think when not exposed to air
, anywhere from a couple of months to a couple of years.
Back in the Mesozoic Era, when carbureted beasts roamed the streets, they used decidedly less sealed fuel systems than our (* cough!) more modern FI V-Twins. Fuel sloshing around in carburetor bowls would evaporate somewhat leaving a poorer combustible remnant - or nothing but "varnish" in extreme cases!
MC operators tend to be a worrying bunch though, which is good for the fuel additive manufacturers, and the purveyors of designer oil blends and filters, and the 100 or so other "special" cleaning products out there!
EDIT: +1 on the noise too. There's 2 time tested ways to diminish the valve ticks, belt whine, and other engine noises:
1. Park the bike.
2. Debaffle or replace your exhaust.
(in other words, don't worry about that either - it's normal (*cough!) for a VN900, that is!!!)
Enjoy that new bike!: