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Your first diagram is for a later model with the beloved “low tension” ignition, this set up won’t work on your engine. The second diagram is for a 57 35hp with electric start and generator, so a little over complicated for your engine.
The decision you have to make is whether or not you want to be able to shut the engine off using the key switch. If so, this will add complexity to the set up that isn’t desirable. Your manual start engine does have the vacuum switch/cut out system for the ignition which helps with lean deceleration/lean over revving. Trying to adapt, wire this into a stop circuit controlled by the key switch, will be tricky. Flimsy leads and chafing could lead to inadvertent engine shut off.
I would recommend just using a simple set up that has a lead for the electric choke, and forget about trying to wire in a “stop circuit” at the key switch. The engine can always be stopped by pulling the remote control throttle lever all the way back or activating the electric choke.
I’m not sure I understand your questions about wiring the electric choke, just be sure it is a 12v choke solenoid. I do know that these air boxes, electric start brackets and electric choke mounts changed during those few years, so it may be tough to find the correct electric starter bracket.