QIf I race this follower 3 times and, while resolving its On Race ability for the first time, summon a follower with Fanfare, which ability do I resolve next?

AYou can choose. After you resolve the On Race ability for the first time, both the second instance of On Race and the Fanfare ability of the follower you just summoned are pending, so you can choose to resolve either one next.

QIf this follower has already raced, can I race it again?

ANo. You can't serve followers that have already raced.

QIf I race this follower 2 times, does its On Race ability trigger 2 times?

AYes, it does.

QDo I need 3 Carrots in my evolve deck to race this follower 3 times?

AYes. If you don't have 3 Carrots in your evolve deck, you can't pay the serve cost to race this follower 3 times.