I suggest you buy a repair manual. This is a complex operation that would take many pages to describe.
3
Shift solenoids are inside the transmission.
It's on the top back corner of the transmission.
On the top of the transmission housing at the back corner.
The trans axle is the transmission on a front wheel drive vehicle
It's on the top rear edge of the lower transmission housing.
The CD changer is in the center console of a 2000 Mercury Villager
The 2000 Mercury Villager front door panels are held in place with two retaining bolts and eight retaining clips. Remove the retaining bolts and pry outward on each retaining clip.
Motorcraft MERCON automatic transmission fluid for the automatic transaxle ( according to the owners manual )
The vehicle speed sensor is at the top rear corner of the transmission housing.
Yes it is exactly the same.
It should be the same.