Additional Costs - 2006 Supercharger

Hey all. I'm looking to secure my first truck and found this.

http://losangeles.craigslist.org/wst/cto/2801483808.html

I'm looking to haul a used Suzuki ATV and possibly my 04 Acura TL when I move so I'm leaning towards a V6 Tacoma with a manual transmission (just miss having a manual).

The 2006 Tacoma Prerunner listed is actually a super charger which I don't need but the truck looks to have what I want. However, of course, the concern is cost. Moving from a timing chain to serpentine belt... when does it need replaced and if so for how much (ballpark)? Other high cost mx due such as spark plugs, etc? I plan to call the insurance co about rates (higher I assume with super charger). How do you value the truck with the super charger?

Opinions?

Thanks in advance for the time.

Dave