So I was about to leave walmart last night and I crank up the truck - everything is normal. I go to put it in gear and the clutch pedal goes limp. So I check the fluid level and there's practically no fluid in the reservoir and I notice a nice flowing leak coming from the passenger's side area right behind the front wheel (I was looking in from the wheel well). It was dark, so I couldn't tell exactly but, it looked like it was coming from a broken rubber flex boot/bushing. Anyways, is that where the slave cylinder is located? If not, what could be broken?

I'll post pics tonight if that will help. Any thoughts are, of course, greatly appreciated!

 

Slave cylinder is under the truck on the tranny, master is the reservoir you mentioned.

Follow the lines from it and check for leaks.

 

Yes, it sounds like your slave cylinder or related plumbing is leaking. A visual inspection should yield the exact source of the fluid leak.

 

awesome, thanks guys. I was hoping that was where the slave was located. Now I just pray it is the only thing that is broken. I really don't want to deal with fixing any of the lines.

 

It wouldn't leak into the truck if it was the line.
My advice is to replace with a toyota part. For master / slave cylinders, I've ended up replacing almost every single after market unit that I've purchased.
Sure, some come with lifetime warranties (if you can find the receipt) - but they're not worth the hassle, possibility of being stranded, or the driveline wear if when they fail.