1) Serpentine belt if its never been replaced
2) Change the oil, you decide synthetic or regular depending on your driving
3) PCV valve- its $5
4) use oem toyota coolant, if you're handy and do your own oil, you can drain and fill coolant even easier.
5) cant hurt to seafoam it- there are plenty of vids on how-to youtube..
6) plugs- use oem iridiums- they're like $9-10 a piece at autozone, easy to change
7) gas, although it really won't use much
I've been more than happy with mine, now at 170k on my 04.. keep up with oil and be easy on her, she'll last.