Just speculation. The Red Car Trolley's will probably only move about as fast as the Horse Drawn Trolley in Disneyland Park. Both being limited by the foot traffic on the street. Not sure on the HDT in DL but on the Omnibus it took about 3 minutes according to a video I have.
The track lenth of the RCT is about 1.5-1.75 times the length of DL's HDT. So this would be about 5 minutes from BVS to ToT. Though there is another thing to factor in.
The RCT doesn't just go end to end. It has a stop in Carthay Circle. In some plans also a stop in in Hollywood, though this may or may not happen. There had not been built a station in Hollywood, though maybe it won't need a structure just a easily built sign. Picture below which you can see in the Blue Sky Wine Cellar in DCA, notes the Hollywood East and West stops.
Additionally this may add some time, though not during the travel. At the end of the line the Trolley's charge their batteries. They do this by induction the same way the Finding Nemo Submarines do. So while simpler to load and unload than the subs, there turn around time may be similiar.
On the physical model of BVS there are some umbrella tables, only a strip lining the building front. You can see them in the drawing above. Not the big circles, the tiny ones between them and the building.