I use my Toyotas as Work Trucks
Here is my '84 SR5 XtraCab, 4x4, 5 spd with a cross box and custom ladder rack.
This is the basic setup for a pickup that needs to work.
Everything gets wet, but lots of options for how to carry stuff.
My '94 SR5 XtraCab, 4x4, 5 spd with a shell
Stuff stays dry, but storage is a problem. Cross boxes don't work. Chests difficult to organize. Few options exist for intelligent storage.
Current '05 Tacoma [see siggi] with custom intelligent side boxes installed.
Height of boxes are the same as the tailgate.
Materials, even long ones

, are fully supported.
The 2x4 behind the cab is for additional support.
I created a web page with more details here:
http://www.lilredfishie.com/nopass/wyatt/ToyotaPics/Toyota_Work_Truck/index.html