Just do a new installation of windows on the SSD without the HDD plugged in first. After installation, plug in the HDD and copy whatever you need from there.
Do you have the key?
Doubt it. And I dont plan on buying another, it was like $300 ahahha
Yeah and I'm pretty sure you can download the .iso and make a bootable usb.
yes
it will be exactly as it is now. Only you will be on the SSD rather than HDD. Saves the hassle of reinstall too.