Just got my Xr6 ED buttt Queries

[Hybrid34]

Finally came home tonight in my new ED XR6, has alot more power than the classic did, lets beautiful, and i'll get somepics up once things are done like wheels etc, just a few concerns with it tho,
--when i press the acceleterator while drive, giving it a bit of gas instantly, i think its the diff that makes a clunking noise...thats a bad thing right?
--When i go over a bump or a turn i get a 'knock' kind of noise from the front or back right side, i think it maybet to do with susepension.
--Open the hood, give it a bit of gas n listen to it, the fan seems to make alot of noise, is it a big job to get rid of that noise (other than a thermo) put my one on from my classic?
-- LASSST thing,the aircon is not cold when i put it on, changing that over from my old car ed, is that big as well?

Hopefully somepeople can solve these quieries, as i have an idea but can't be deffiant, let alone how to solve.
thanks
- Ash