Most of the TVs are the same and have a built in Roku and all the TVs are smart TVs. So if you have a Netflix or Amazon or Hulu accounts, you can watch shows and movies there. Just remember to logout of your account before you leave.
The TV in the den will be powered on by the Samsung remote and then if it says no signal, you will need to power on the Time Warner Cable box. Once the cable is on, you can adjust everything from the Time Warner remote.
The TCL TVs have the Roku and when you power it on just select cable as the input and you are good to go.