max is 5. process to erase all existing keys except for the master being used is said process is listed on page 10 of this pdf. https://www.toyota-4runner.org/attachments/4th-gen-t4rs/49073d1313545332-programming-new-key-t-be4022-lc120-pdf
to add onto AuSeeker, the valet/gray key is a "sub-key" which cannot be used to set the car into programming mode to program additional keys. you're allowed 5 unique master keys and 3 unique sub-keys. what the locksmith is likely going to do is just clone your subkey.
if you don't have a...
newly added keys all function as master keys and can program additional master keys unlike the valet key that cannot (programmed as subkey). you can have 5 master keys registered with the immobilizer.
one thing to note is that because your locksmith just cloned your single master, if one of...
in case you want to make more, you can just buy the blank dot / 4d67 key online and then take to your local dealer to have them cut it by VIN for ~$10 for fresh factory cut key. then to program key yourself, steps are listed in the original post.
wanted to clarify that its the main socket (middle) / plug that needs to be properly seated, twisted and contacts properly lined up. this exact problem pops up at least once a month here.
you can see below how the other 2 bulb connections are powered via the main socket. so neither turn signal...
make sure to twist the socket in place otherwise no turn signal or reverse light even though the brake light works. twisting the socket grounds the other 2 bulb connections.
also rear wiper will only work if rear window is completely rolled up.
ya definitely keep us updated. when i last looked into this i was told 4th gens required 5 tpms. even putting all 0's for spare didn't work (this hack would work with 5th gens only because most years and trims except for limited just had 4 tpms). so alt was to put 5th tpms in pressurized...
to add-on check online parts store of your local dealer. will be cheaper than calling in or ordering in-person. can do local pickup when ordering online for many. note there will be added $75 core charge refundable when returning old oem part.
did you have to reuse any hardware from the original grille to install this new one? 03-05 peoples appear to have to reuse a metal bracket from original grille. wondering if same for 06-09 too.
timing cover leak in the 5th picture where there's one point the fipg eventually degrades. quite common on early 1gr's. there was a tsb for it. it's not hard to fix yourself but time intensive so costly paying a shop to do it. most just let it be if don't have to refill often.
edit: adding pic...
did you end up repainting all your mouldings? i'm trying to figure out how many cans of base coat and clear i should be getting to re-do all my moldings.