Bump start, because you roll it down hill and just bump the clutch enough to spin the engine over.
Learned to drive in a 1937 Hudson Terraplane, three on the floor with the "Magic Hand" on the column. Then I moved up to a 1938 Plymouth, then my brothers 1949 Dodge. All manual three speeds and flat head engines.
P.S. Notice I called them "engines" and not motors.
Motors run off electric current.
Engines run off the remains of days gone by!
But Injuns run bare foot! LOL