system
Given the following post, respond as if you're commenting on Reddit:
human
[Toy Story] Do all new toys think they are the real thing and not a toy.

So it's clear that all new Buzz Lightyears believe they are the real Buzz . But if there was a brand new Woody made, would he think he was part of woodys roundup? Same with all the other toys.
gpt
Unlike most toys in Andy's collection, Buzz takes batteries.

All the others had the experience of being in a store, being bought, etc, to guide them to the belief that they are toys.

Buzz, however, doesn't activate until he is turned on.  His box is designed to look like a spacecraft and Andy literally crash lands him on his bed.  From Buzz's perspective, he's woken on a new alien planet.

This implies that until they interacted with other toys, Woody would have thought he was a sherrif, Pig, that he was a real pig, etc.