Depends on which end broke - if it snapped at the release handle
end, get a screwdriver to remove the handle, and a pair of needle nose
pliers to pull on the stub of cable.

 If it broke at the latch end, you may have to rig up a long chunk of
steel rod with a hook to trip the latch from below, and tape a cheap
CCTV camera to the end of the arm so you can see what you're trying to
grab.  Make like you're playing a video game...

 Get a matching year truck where you can get the hood open to see
what you need to grab on the hood latch and which direction to pull
it.  You can also use the study vehicle to design your release tool,
with the advantage of access from above to make bends and adjustments.

 Might call your local Toyota dealers and/or local locksmiths.
They've dealt with this a few times before ;-) and may have advice -
or they've already built their nifty tool that is available, the
rental will cost you one six-pack of their favorite libation.

   --<< Bruce >>--