How do i make a NPC that you can talk to? Also, how can i make it give you things? (Like a dealer)

I would need this to make a new place, as i chose to halt free model usage. Anyone knows?

go here for the dialougs, and go here for the shop. try to check the wiki.

The answer above this one does not have enough clarification. Don't worry, I can help you out.

There is a specific interactive object for speech named a Dialog. You have probably noticed it and wondered what it is. Well, it makes a small chat bubble above their head that can be clicked. I cannot explain super easily, so I will make a copyable place so you can test and edit it how you want. (I made it, and the link is here)

If you want me to change some stuff up, like to not give the player a gear if they already have it and/or a message to show that you already have it, just comment on my answer.