What tools and information do i need to know about changing my worn rear brake lines (1993 Saturn SL2)

You could have air in the system.
The rear shoes may not be adjusted correctly.

you will need a helper to pump the pedal do it with the engine off have them pump the pedal hold it down and then open the bleeder do the several times til all the air is pushed out make sure not to let the reservoir go empty if it does you will need to bleed all 4 wheels

Hi, if you can replace entire lines without making cuts or splices, the work can be done with line wrenches alone. Measure the bad lines from the wheels to the next fitting and compare the stock lengths to the standard lengths available at your local parts store. If the available lines are a few inches longer than the original lines, that will do without splicing.
A line wrench is like a box-end wrench except there is a cut in the wrench to allow it to pass over the line. Sometimes you can loosen a brake fitting with an open-end wrench, but it is not recommended due to the risk of rounding/stripping the fitting.
If you need to cut and splice the lines, you will need cutting and flaring tools.
You may need to bleed the brake lines after replacing the lines, but if you're careful to plug any open lines and not let the reservoir run dry, this could be minimized and could possibly be gravity bled.
Be careful to catch and clean up any fluid that comes out, as brake fluid is corrosive--especially to paint.
To gravity bleed, just open the bleeder on the right rear first and leave it open until pure fluid flows out. If it does not flow any fluid within 15 minutes, then you will need to pressure bleed. After clearing all air from the right line, bleed the left rear line.
You should know that this work is not expensive, so I recommend that unless you are comfortable doing it yourself, it may be a wise move to get an estimate from a brake shop. The labor is only about an hour or two at a good shop. If the car is not drivable, you would also need to factor in any tow fees.
Please let me know if you have any questions.

May just be the bulb. You didn't say if you tried that. More than likely thats it

either check your brakes or have them checked, sounds like you may need new brake shoes on rear.

Your valve body and possibly input shaft nut need to be replaced. The valve body's booster valve is worn down and won't create pressure. Before it went completely out it slammed on the input shaft nut and loosened it.

You need to replace the valve body and retorque the input shaft nut. The transmission is not junk. The above needs to be replaced and change the filter and fluid and do it every 20K miles.

sounds like your breaks need to be bled.
if it still is kind of spoungy then the routers are bad.

Saturn says and I quote

there transmission fluid is not to be changed after the first change at 6000 miles.

Now I say it should be changed at every 30000 miles. If changing out the fluid doesn't work then you need to go to a transmission repair shop.

1st take the positive post off when you start removing it. You will have to remove the ball joint on that side to get it off.

gently tap with rubber hammer pull drum straight off while doing this