If neither the ferry or monorail are running, there will be buses. But, you have to go around to the side to find them! That area isn't that obvious unless you know what you're looking for.
If you are coming from an offsite hotel and are going to have to pay to park anyway? Just drive to the CR and valet park there. Then walk over to the MK...takes less than 10 mins.
If you're staying onsite, I can't imagine why you would drive. Taking the bus to MK is always recommended. However, if the boat isn't running from FtW, then they are going to have to provide another means of transport. If this is the case, talk to someone in authority there....have them arrange transport for you. If Disney doesn't have the usual transportation options available, they usually provide an alternative.
This is why you need to leave plenty of time to reach your final destination.
As far as what is actually at TTC now? Not much. Buses from offsite resorts use this area to drop off guests. Lynx has bus stops there as well....Orlando's public transit system. And if the monorail is down, there should be buses to MK and Epcot available.