Will i be able too use my PC character on the Ps4

[Eewec]

If it works anything like the PC or PS3 version, you'll need one copy (code) for each player who is going to be using it. So if the wife/kids play and have their own FFXIV account, they each need to have their own SOE account (make sure everyone knows to log in to the correct one on the PS4) and each their own copy of FFXIV to play on that account.

Linking your PSN account to your Square-enix account will allow you to play on your character on any of the three platforms, BUT make sure you link the correct pair of accounts up or you'll be stuck. Once linked they can't be split.