Q: Can I put windows 8 on the new MacBook?

Yes. Yu can do it two ways:

- Use Apple's Boot Camp to run windows on the hardware directly. That only supports 8/8.1 and later

System requirements to install Windows on your Mac via Boot Camp - Apple Support

- Use a virtual machine like paid Parallels or free VirtualBox to run windows as a virtual machine on top of OSX

For both you have to purchase the windows software