Is that it, do I need more hose or fittings?
It all depends upon how Festool offers the foot valve when it's sold as a stand-alone item. When bundled with the SE1, its semi/tethered to the SE1 and has the second port plugged.
However when it's sold on it's own...who knows what's needed. My guess would be that both ports are plugged to prevent contamination. However, that could then become an issue because the face gaskets that are needed for the port plugs/connectors are not available for sale.
You'll need to talk with Festool customer service to ascertain exactly how the foot valve is leaving the service department.