How many toy story characters are available in collector tins?

The provided evidence does not contain any details about collector tins or the specific Toy Story characters that may be included in them. Without data from official toy releases, retail announcements, or reputable collector guides, it is impossible to determine the exact number of characters available in such tins. To obtain this information, one would need to consult official Disney or Pixar merchandise catalogs, reputable toy collector databases, or product listings from authorized retailers. Until such sources are examined, any claim about the number of characters would be speculative and not grounded in verified evidence.