*welcome and good purchase, hope you enjoy it! (check your oil regularly until you know its habits)
yes to belts! yes to water pump, upgrade it to one with metal impellers? maybe to variator
not to muddy waters but you could take a gamble on not doing the variator. Its your choice so just weigh up what everyone says
the variator noise only means its starting to fail - all this means is the timing doesnt change around 3k revs. this is not a problem, it would only slightly impact your economy if anything. And of course make a terrible noise at startup, but it wont be loud - it will slowly get louder over time. a good boot when standing every now and then should help prolong the life of it when it does start to rattle on start as I assume it gets a bit gunky with oil as it sits low??? so a few revs on the driveway would help flush it - I could be talking rubbish mind.
*mine started rattling just after I did my belts so I was a bit peeved but it didn't affect my econony or anything - I think there was a slight lump in the acceleration between 2.5-3k revs, thats all.