I assume this question is referring to the original name of the character? When the character was first created, his name was Mortimer Mouse. But Walt Disney's wife convinced him to change it to Mickey Mouse.
I have a mickey mouse bike from the 1960's I am looking to sell. I also have a 1992 toy. They are both in really good condition. If you are interested send me an email firstname.lastname@example.org. I can send you pictures of everything :)
Quite a lot. it was old so it is more money, the 1957 mickey mouse is different to the modern day one today, it is much more cartoony in that time. it would cost about £1128.47, i dont know for sure. hopes this knowledge helps :)