The Grinch is a fictional character. He is a green, furry creature who lives on a mountain above the town of Whoville. He hates Christmas and decides to steal all the Christmas - related things from the Whos in Whoville.
The airtime of A Christmas Story on TBS can vary from year to year. Usually, it's shown during the Christmas season, but the specific date and time could change. Keep an eye on TBS's programming announcements.
It's hard to say. Sometimes their programming changes, so it's best to look on their channel or online listings to see if they're airing A Christmas Story.
The time when A Christmas Story is on TBS isn't fixed. Sometimes it's in the morning, sometimes in the evening. You'll have to look at their current schedule to know for sure.
The Grinch is purely fictional. He's become a beloved character in children's literature and media, but he doesn't exist in reality. His antics and personality are all part of the fictional world.