I am yet to replace mine with clear ones but they seem to be almost hinged in the middle. You may have to use a flathead screwdriver to wedge between the reflector and light bar on the sidelights and ease it towards you to gain access to the screws to remove the whole fitting.
Pull out the side orange reflectors on the back corner. Unscrew the two screws and then the screw on the top that is located when opening the boot. Then u can pull the light out
The starter on a 1991 Toyota Tercel is located in the front of the engine. It will be located on the left side.
you change it
You will need to change the brake light switch. The brake light switch can be found below the dashboard on the drivers side.
Go to this website, click on 'bulb', and it will walk you through it. http://www.toyotaownersonline.com/parts-service/diy.html
Should be located in a fuse panel under the hood. Google it and it will show you. Most of the time Toyota put them under the hood on the driver's side.
On the side of the silver canister
left side tranny
behind the dashboard on the passengers side
You have to pop the panels off inside of your hatch, right on the other side of the tail lights, you should be able to see the back of the tail light from there.
It's down on the side of the driver's side engine compartment.
On Engine, drivers side, under intake. Very tough to replace. Bad Toyota!