Is there a way to upload ios builds on a pc?

Or I must buy a mac for that?

yes unless you can get software like Vmware running on your pc to run mac Os on it

Does it let you run xcode and upload apps on vmware?

if you can get it to work. but if your not great with computers its not worth trying as there can be lots of troubleshooting. your best bet is trying to see if a friend has a mac you can borrow or a local library or thing

Is it that easy once you have a mac?

mailalon yeah depending on how your exporting from C2 its just a couple of clicks. if your using xdk all you have to do is open the application loader from Xcode and upload

There are cloud services that let you rent virtual mac images by the hour. They are typically equipped with Xcode and everything one needs, because people rent them for that very purpose.

I'm not going to advertise any specific service here, but you should find plenty by entering something like "mac in a cloud" in Google.

great, many thanks