For struts Tociko HPs (blue) or KYB GR-2s. TRD also has struts and springs.
Anti-sway bars,as far as I know nobody makes them for this year you have to go custom, but there are places that custom make them and they aren't totally too expensive.
For a Strut bar TRD makes a nice one from there you can get a bunch of generic ones. I think OBX makes one as well.
For Springs besides TRD there is Eibach, Tein, H&R, Apex, and many many more...
For coilovers, Drop zone, Ground Controll, Skunk2, etc.
Check out
www.vvti.net/forums
Skim through the posts and look at people's signatures to get an idea of what people are running on their 98+ Rollas also check out the suspension mods forum there.
As for installation just get a Haynes Manual (local auto parts store) they will have full instructions with pictures for removing and installing suspension components. Plus alot of manufacturers have installation instructions available for their products
Good luck.
Chris