Command console, and log.

I press TAB when the game is running and the command console doesn't appear. The log doesn't show print scripts.

You must have at least one font in your game which is used to display the log entries in the TAB menu. Also set your log level to Info in the Playersettings of VS.

If you are a windows user, I highly recommend downloading an opensource application called snaketail & using that to monitor the log files as it can be used to display the log files in realtime rather than having to constantly hit tab & type PRINT LOG.

You can find the download link & a guide on how to setup SnakeTail here.