The first Camry manual transmission I did, I ended up burning out the ground-when-running output from the remote start because I bypassed the clutch the wrong way.
1. I think at the clutch switch there are two heavy wires. One will test as a ground when you push the clutch switch in, but don't let that lead you in the wrong direction.......it's a positive starter wire, not a ground.
Anyway, so you'll find that one of those wires tests as a starter wire when you turn the key, anytime.
The other wire tests as a starter when you turn the key, but ONLY when the clutch is pushed in.
OK, so now you've found those two wires, right? You'll use a relay that'll jump those two wires together, but ONLY when the remote starter is on. When the remote starter is off, the clutch switch will work like factory.
Wire the relay like this:
87: one of the clutch wires
87a: no connection
30: other clutch wire
85: fused constant positive
86: ground-when-running or negative ignition output from remote starter. (Pretty much any kind of output from the remote starter that'll make a ground when it's on would work.)
2. Haven't used a PASS-4 myself, but yes, since it's a different brand, you'd have to cut off any kind of plug it has, and hardwire it to the compustar manually. How many wires does it have? Just two probably, right?
The instructions should explain.......one should be for constant positive, and the other should need a ground-when-running output from the remote starter.
What tedmond said is true, that the module you have is the most basic, and you'll lose a key. For a little more money, you could have got a module that would let you keep all your keys......but nothing wrong with using what you already have either.
3. They give you choices to do it whichever way you want. You'd use one or the other, but not both.
The Camry does have a brown positive parking light wire, down along the driver's running board.
But, the negative (black) parking light wire is right in with all the ignition wires, which makes for a neater job.
I would cut the green wire short (leave a couple of inches and tape it up in case you transfer to another car).........and run the negative parking light wire right along with your ignition wires.
(Not to overload you with information, but Compustar has a nice feature. When you use the negative parking light output, you can reprogram that green wire to be a positive trunk output. This saves time and money instead of having to wire up a relay to pop the trunk. But your Camry CE doesn't have a power trunk anyway, so in this case it's not of much use to you.)
MORE:
As tedmond said, your car has two ignition wires, two starters, and one accessory.
Accessory: I prefer not to connect accessory, to prevent the radio from coming on during remote start. But that's up to you.
Ignitions: You need to hook up both. One of them allows the car to start, and the other allows the heater to come on.
Connect the Compustar's Ignition 1 wire to the heavier yellow ignition wire in the car.
Connect the Compustar's "selectable" output to the pink ignition 2 wire in the car. The internal jumper should be on "ignition."
Starters: There are two starter wires, a heavy blue, and a smaller gray.
Some people will advise you to just take the Compustar's single starter output, connect it right up to the Camry's two starter wires, and call it a day.
That will work, and people have done it all the time and the car doesn't explode. However, Toyota built the car with two starter wires for a reason, and if you jump them together, you're changing the factory design of the car.
The Compustar does have a negative, low-current second starter output, made just for this purpose, and the instructions should tell you how to wire it up.
You would hook the Compustar's main starter output to the Camry's heavy blue wire.
You'd then use the Compustar's negative start output, wired to a relay (the install manual should show how), and the relay will power the car's second starter wire.
P.S. IMPORTANT:
You can't just use the Camry's domelight wire as the door trigger input to the Compustar. The car's domelight comes on when the engine shuts off, and the remote start enable mode will never work.
You have to catch all four doorpin wires separately, diode-isolate them, and then connect them to the Compustar.
The wires are all available at the fusebox, but two of them are on the backside, and really difficult to get to.
I do remember that the driver's doorpin is blue, and it's the only blue wire in a plug very low in the driver's kick panel.
I would guess that you could catch the driver's-rear door wire in the driver's running board.....and run over to the other side of the car, to the other kick panel, to catch the other two doors. Running the wire over to the other side of the car will probablhy prove far easier than reaching up behind the fuse box.