I agree with Steve - I'd doubt 4x4 rear springs would give you much lift. Even if you want to attempt that, definitely don't return your Daystar rear spacers until after you realize that new rear Toy springs aren't much different at all from what you have. You're past the 30 day return anyway.

If the 1" front spacers actually measure 1" thick, then you'll get more lift than that in front, since the coil-over-shocks attach about halfway across the control arms. In contrast, the thickness of rear spacers are a direct correlation to the amount of lift you'll get there since it's just above the springs, above a solid axle.

No, you shouldn't need new shocks, although I'm not familiar with 2wd stuff.