USCF rating is your rating in the United States Chess federation, the rest goes along with that. you have to join the USCF to enter a lot of OTB tournaments.
a 1/2 bye is a round where you get put through without actually playing and they give you 1/2 point as if you had drawn a game.
What is a USCF rating,ID,Membership I'm entering my first tournament and they said I need all that also what is a 1/2 bye? Here is a link to the registration https://onlineregistration.cc/tournaments/index.php?txn=y9Dg4A==&view=zt7g2Q==&tid=nKWg&act=ven