Welcome to the forum!
Tell us more about the dealer - Ford/Lincoln dealer? If so, they should have provided the extra key, fob and door code for free. If not, go right back and punch them in the head until they do! Otherwise, you’re better off doing everything on your own.
I bought an extra Mercury key blank and fob off of eBay. Local Ace Hardware cut the key and the dealer stated the fob wasn’t compatible with my car. Local Ford dealer charged $56 for a replacement fob and $95 to program both the new key and fob. They installed my front license plate bracket and freed up a frozen airbox nut for free - they were tickled to have the car on their premises!
I bought my car from the 2nd owner back in March - 41k miles at present. The sale came with one key, fob and valet key. Seller stated that was all he received when he bought it from the original owner back in 2006. He did give me the keypad combination he had written down.
Was hoping to get a reproduction dealer window sticker from a member here but he seems to have fallen off of the face of the earth. I placed an order with him, we communicated once, no money was exchanged and that was the end of it - hoping he’s doing allright and I just got lost in the shuffle.
A wealth good info and experience on this site and don’t be afraid to ask questions.
Joe