I have this exact same tablet. I had to root it with some weird Chinese root method. I believe it was Kingroot (not Kingo). The only problem is that TouchWiz has some security measures in place to try to mitigate rooting attempts, because they are malicious exploits after all. So you'll have to take some extra measures to get it to work. I don't remember them off the top of my head, but I do believe that I never had to mess with ODIN, so there shouldn't be any need for a PC. It should also be noted that root privileges for apps don't survive randomly at reboot for whatever reason. All you have to do is reboot again, and then they should return.