Windows asks for pairing code for the Sphero, what?

We were able to use 1234.

I want to connect to a Sphero with my PC but the gosphero.com site doesn't have any API's, how to make fix?

I suggest looking at this site.

I also want to work with Spheros, may I use your code?

Yes, we don't have any restrictions on it. However, if you're not looking for our extended features, I suggest you look here for an standard API instead.

I wanna use this but I don't know how to use Git..

Worry not dear user, I suggest this site for starting things up, and this site for learning the basis of using it. But if you don't want to learn to use git there is a download zip file button on the git site.