How to book a toy story character meet and greet?

The only verified facts available describe the Toy Story franchise as a series of animated films and related media, and list the characters that appear in those works. No details about booking or scheduling meet and greet events are included in the provided evidence. Therefore, the question cannot be answered with certainty based on the given sources. If you need to find out how to book a meet and greet, you would need to consult official Disney or Pixar customer service channels, theme park information pages, or authorized event booking platforms.