iCloud sign-in issue on newly purchased MacBook

I purchased a MacBook from someone online, it was erased when I got it ready to sign into my iCloud, when I signed in everything went fine up until the “terms and conditions” in which the “accept” button would not allow me to press it. I THEN went back and pressed the skip for now option in hopes that I could sign in when I got into the computer, BUT when I try to log in it’s saying my password or username is wrong so I changed it and that STILL didn’t fix the issue. I THEN tried to creat a new Apple ID and it says “can’t create account at this time due to server issue” please help.

[Re-Titled by Moderator]