Chris, I think I still have one from my Taco. I will have to check on the spare key hanger in the garage, but I think that I have one there. I'm not sure how you go about changing the codes or whatever, but if I have it, it will cost you dearly....like a 6 pack of Heinies!
I'll try to remember to take a look this evening and give you a call.
I found the write up for 2001+, but not for a 2000...the one that I found was crazy as hell all the crap you had to do....slam door 4 times, open door, turn key, shut door, drink beer, take crap.......and then the doors unlock...what?
Ebay has been a great source for me to get just the right remote, and instructions. It took me a couple months of searching to get the faub that would work with my 96 T100 because Toyota was just beginning to put keyless on vehicles... by 97 they were much better and more common. So, I'd recommend doing some ebay searching.