I hope this will make up for 12 points:
##4: 1914 Knox tractor with 120-passenger trailer, built for George Schlitz, New York
#7: The complete name is Robur LO 2500, 18-seat version built from 1961 to 1964
#12: Ikarus 66, designed by György Horvįth
#13: YaTB-3 (Yaroslav Trolley Bus), built in 1938/39 for Moscow Transport
#16: Gräf & Stift DD U11 H/1 from 1966, built for Wiener Verkehrsbetriebe, Vienna
#17: Chausson ANH, built from 1951 to 1956, the pictured one built for Voyages Dubreuil by Currus
#28: Mercedes-Benz O 10000 from 1938/1939, built for Berliner Verkehrs-Betriebe (BVG), body by Trutz (Coburg)
#33 is the same bus as #13, a YaTB-3
PS. I kept some more answers