Replacement is fairly easy but I recommend having a friend handy instead of propping up the hatch as it is fairly heavy without the lift supports. The most recommended aftermarket lift supports can be found at www.liftsupportsdepot.com and are around $59 plus shipped for both.
you will need a 12mm wrench to take off the original ball joints from the hatch and you can use a socket with a 3", or so, extension for the two bolts holding the lift support, or strut, to the car. Many people recommend getting a heat gun and heating up the ball joint bolt as well as the metal around it, assuming the metal on the hatch expands faster than the bolt, so that the lock tite around the threads breaks loose.
After you have the original ones out put the new bolt/ball joint in on one side and attach the new lift support with retaining clip. The bolt for the new ball joint is 13mm rather than 12mm, not sure why, but something to note in case you don't have a full set of metric wrenches. It shouldn't matter which bolt you put back in at the bottom on this side, but I recommend putting in the bolt closest to the body of the lift support as this one can be tough to put in after the exterior bolt is put in. Repeat on the other side and you are done, I did notice that putting the inside bolt on the other side was a little more difficult, so I definitely recommend starting with that bolt at the bottom of the other lift support.
For installation tips click on this link http://autopartsbylou.com/lift-supports-faq.php
Round black canister about 8" underneath your stock intake piping, bolted to the metal around the driver's side strut assembly.
Begin by compressing the strut spring with a spring compressor. Be very careful as the strut spring will be under hundreds of pounds of pressure. Remove the strut retaining bolts. Reverse the process to install your new strut.
Not my instructions - but I have used them, and they are correct (can't verify strut part # though). http://gallery.sanitylapse.com/v/supra/Hatch+Strut+Install+5-29-05/DSC_2385.jpg.html
no, they have strut style suspension.
Inside the gas tank. Unless you're talking about the fuel filter. The fuel filter is located in the front, near the driver side strut tower. You'll have to remove the air filter housing and air intake hose to see it properly.
Spring and Strut
the most common noise maker in the front of any of toyota's cars is the strut towers also called bearing plates. not the strut itself but the plate that the strut rod bolts through and is bolted to the body with three bolts
remove the rear wheel, undo the bottom bolt of the strut. inside the car remove the plasic paneling in the back covering the strut mount. unscrew both nuts and pull the strut out.
Remove tire, Large bolt on the end the the half shaft, then lower ball joint, then pull the rotor and strut away from the car while pushing the half shaft out of the rotor and using a pry bar between the halfshaft and transmition pry out the axle. Then install new.
All Toyota Camry's have struts in the front. This is also accompanied with strut mounts and bearings that are located between the mount & strut. I highly recommend replacing the mounts & strut bearings with the struts. My experience has shown that the mounts fail before the strut.
take out back seat and trim pieces
The rear struts can be removed, on your 2005 Toyota Camry, by removing the nuts on each end of the strut. With the nuts removed the strut should slide off of the stud.