Santa Claus is actually a combination of Odin and Thor. But before I get into that, you need to know that Coca Cola created the signature "look" of Santa Claus as he is depicted today as well as the poem the Night Before Christmas. Previous to that he was Father Winter or Old Man Winter that is directly related to Odin.
Thor wore red and drove a chariot in the sky pulled by goats. Odin rode a flying eight legged horse. Mix that together and you get an old man (Odin) in a sleigh with eight hooved animals.
It changed a lot through the years, which is why the "origin" is Odin, not the final product. I tell my daughter that Santa Claus is a "jolly old elf" which explains exactly why he is so sneaky getting presents into the house unseen.