Are rated at a 2.25" rear lift on 1st Tacos. They may start at 3", but will settle out a little flatter and give a well suspended, yet comfortable ride. 881s and OME struts and that would round out a good system for a mild lift, upgraded suspension.
After a little searching you will find all the info you need to develop your own idea of what exactly you need for your purposes. don't hesitate to call some vendors either, they are not only in the business of selling the gear, but typically run, or have run, many of the setups they sell. They will be able to inform you well.
'04 Tacoma XTracab 2.7 5-speed 4WD stock 4.30s, 5100s with 881s set on the middle notch, Dakars with 10" 5125s, Budbuilt IFS skid, TG front bumper, and a few other things