No, they can be replaced with the engine in the vehicle, but it is not an easy repair.
Well to my understanding, you have to drop the transmission pan, remove the gaskets (you will need new ones later), then drain the fluid, then replace with new gaskets and replace pan, then refill fluid. I don't know how else to do it myself.
Yes
Pull or lift the engine, drop the pan then replace the oil pump. Pull or lift the engine, drop the pan then replace the oil pump.
If that is the Northstar engine, yes.
I had a problem like yours in which antifreeze was coming out the tail pipes and no problems with the oil. In my case it was the head gasket, I didn't drop the engine to replace the gaskets but it might be easier to do it that way. It took me prob 20 hours to both remove and replace the gaskets. Now if i remember correctly it's rated at like a 16 hour job from a mechanics view so unless your going to do it yourself it's going to be an expensive fix. Hope this helped.
No you don't have to drop the transmission in order to replace the slave cylinder, but be careful because it can easily be stripped.
Drop the gas tank I got the same car
2.3 L engine. You have to drop the oil pan to get at the pump. You can do this with the engine in the car.
You will need to drop the transmission pan and replace the gasket. While you're at it, replace the filter and clean the pan.
The most common way is to support the engine from above, drop the frame under the engine and trans-axle, remove the transmission and clutch. Replace flywheel and reassemble.
Drop the complete engine and subframe. it pays 16 hours.
If I am correct in assuming that you have the 4.9L engine, then yes.