Only the Thrustmaster wheels are supported on PS4. Logitech has confirmed that Sony has the PS3 drivers which would work on the PS4 in theory; however, another group has stated that Sony requires a chip for USB devices with high polling rates to work due to a timeout every 8 mins. Since this chip has obviously only been provided to Thrustmaster, only their wheels work.
No. Ubisoft did a Q&A in 2013 about the game. They said it would not be free to play or have a subscription. So basically you just pay the $60 USD and you're good. http://forums.ubi.com/showthread.php/806230-The-Crew-Q-amp-A-November-2013-Forums