If yer gauges are reading zero, you should be able to test the system fer any residual pressure by lightly depressing the fill valve (low pressure line) and see if anything escapes. Just so you remember, the low pressure line is the fat one and the high pressure line is the skinny one.

Do you see any sort of black debris in the sight glass on the drier? If so, yer gonna probably need to replace the condenser and flush the system thoroughly. This would also be a good time to remove the evaporator and thoroughly clean the fins vs leaving it in the vehicle and trying to clean it while it was installed. It only takes about 5 minutes to remove the blower unit and the evaporator unit. Follow my guide in the DIY Thread section under the Air Conditioning section. You don't have to remove the dash to do this.
https://www.toyotanation.com/forum/60-t-100-forum/1624842-replacing-ac-evaporator.html

Do you know why the hoses were leaking at the condenser? Did they git tweaked or damaged in an accident?

 

Thanks as always, Bam. Hadn't posted on here in over a year and was hoping you were still around! Didn't see anything odd in the sight glass on first check, but will double check for any black debris. Will definitely clean the evaporator's fins (and the blower motor, too... I can't seem to go a season without a leaf getting in there and then making a racket when the fan is on!). RE: why there's a leak in one or both of the hoses, you know I bet they did get tweaked when somebody bumped into my front corner passenger side while trying to take a left across traffic :facepalm: They were only going about 5 MPH but that was probably enough to do it. Had to have my grille replaced. Anyway, thank you again!

 

Well after getting the new hoses and installing them, it turns out the leak was actually in the metal pipe coming from the high pressure line directly UNDER the hoses I replaced, lol. I see that the OEM part is around $65 (no aftermarket part to be found on RockAuto at all!), so not that expensive, but I'm wondering if it's possible to use some sort of sealant or wrap to plug the leak. Does anybody know if that's a common solution, or should I just replace the whole pipe? Thanks!

 

We used to weld aluminum A/C lines, evaporators and condensors at the radiator shop I worked for since we did A/C repairs anyway.
You could make some calls but at $65 bucks for new, a repair would most likely be a minimal savings.
I've never seen anything out of a tube work.