Neither a good answer or a good solution.
There is supposed to be a way to disable the honk on starting. The owner's manual says you can enable Quiet Start in the Display menu settings. The 2015 manual refers to it on Page 56 and refers you to Page 96, but Page 96 does not mention it.
It is mentioned on Page 64 and 109 of the 2013 Owners manual. You also have auto, front defrost, rear defrost, and duration settings.
If you are in a subdivision at 4 in the morning, the exterior lights are supposed to flash twice to confirm that the car remotely started. If you can't see the car, you can enable the horn chirp.
If you can't see the car OR hear the horn from where you park, you probably want a better aftermarket remote start like a Viper where you can start the car remotely with your cel phone and receive confirmation that way.
As far as the door lock, I'm not sure how to disable it on newer cars. If you press the lock button, the parking lights flash. If a door is ajar, the parking lights will not flash. If you wait 3 seconds before the second key press to check if the car is locked, the horn will not chirp. Kind of annoying, but it is a workaround.