i think those would have been airstruts. not sure if they would work on a yota. but the good thing is that toyota's have close to the best suspension for airbagging.
when i bought the stuff for my hilux i spent right about 1300. but that was shopping at a lot of different places, already having some of the stuff lying around. i would say rougly $1500-$1600 not including installation.
Welcome to the site! The truck looks good. It'll be a nice starting point. Don't let bernie touch your truck, it might come out looking... cool