yannyfreak, the wires you list look pretty good. I'll try to make a few comments on them, section by section, using the names you made for each section.
Python connections:
You would turn the toggle switch off before making repairs under the hood, to prevent the car from starting and injuring you. If this were a customer's car, you'd want to consider drilling a hole, mounting the switch, and explaining its operation to the customer. Since it's your own car, I think you'd be OK to zip-tie it under the dash where you can reach it.
I'm pretty sure that plug is taped off so the factory knows which units are new and which are used. Just pull the tape off.
No idea about that horn polarity; that's new to me. But the horn wire in the car is negative.
Main Harness:
WHITE/ brown not used on your car (used for some cars where the light wire has to be cut in half and routed through the remote starter)
Orange ground-when-armed: Are you planning on installing a starter-kill relay to make the car harder to steal and/or as anti-grind so you can't grind the starter when the remote starter is on? That's what this is for. So you'd either connect it to Pin 86 of a starter kill relay, or cut it short and don't use it for anything.
White parking light wire and the fuse: Your car has a negative-trigger parking light wire at the switch in the steering column, and there's also a positive wire (green) running down the driver's door sill to the rear of the car. Your choice as to which way you do it, but the fuse position must match.
(Or, simply explained: If the fuse is in the negative position, the white wire puts out a ground. If it's in the positive position, it puts out a positive.)
Door Lock Harness:
Yes, you have it right.
Tip A: Test these wires while turning the key in the outside of the driver's door.
Tip B: Program your Python for 0.4 second lock pulses and the locks will unlock faster. Also set unit for double-pulse unlock if you want to unlock all the doors at once, or leave this setting alone to retain driver's-priority unlocking.
Aux Harness:
Brake is in the driver's door sill going to the rear of the car. Easier for you, and no chance your wire will get caught up in the pedals if it comes loose. In the door sill, you should find one green (positive parking lights) and two GREEN / WHITEs (must test; only one is brake). I usually just get my lights and brake here together.
Tach: I do this another way. The black trim around the instrument cluster is held in by one fake plastic screw at the top, and then it just pulls out. (As with any car, only pull on plastic panels when the car is warm. I would let car run with heater on maximum for a little while before working).
Once you get that plastic out, you don't even need to remove the cluster or anything. The wires come out of the top of it, on the left side.
You'll see many black wires in the harness. But off to the left side, find a RED / white. (This is door trigger if you were to install an alarm, but you don't need it today.) Anyway, the black wire just to the left of the RED / white is tach.
Remote Start Harness 8pin connector
Everything there is correct. By the way, the blue/red accessory wire just powers up non-essentials like the radio, mirrors, and cigarette lighter. I like to leave this un-connected to keep the radio quiet during remote start. Up to you.
And yes, the only door and lights connections you need for remote starter is locks and parking lights. If you were installing an alarm, you'd want to find door trigger and trunk pin, but you don't need it.
ADS bypass
Yes, you have that all right. A few comments though:
D2D has been a disaster and works when it feels like it. Might want to leave your Python blue/white wire long until you know the install is good, then cut it short if/when D2D works.
The 2-pin connector with keysense, you'll notice the other wire is WHITE/ black. This is a ground wire; connect your white here if you want to.
And something to make those TX/RX wires easier to get right: Pin 3 is always empty. This will help you from counting pins backwards. So, even if you don't know which way to count the pins, it should go like this:
1: wire
2: wire
3: empty
4: connect GREEN/ red
5: connect gray/red
P.S. Was this already mentioned upthread? The 2-pin keysense connector is RIGHT next to the ignition wires. Put your key in the ignition, open the door, unplug the connector and make sure the door chime stops.