Yes, you can move Windows.
Yes, you can move Windows.
Be aware that cloning often fails when the drives differ. It's safer to reinstall Windows on your SSD and move your data from the HDD to the SSD.
Sure, I can create a backup of the drive. However, a fresh installation on an SSD would be preferable if possible. You could also use Acronis TrueImage to clone the drive—it can automatically adjust partition sizes even if they differ.