2 Toyota Corollas a 94 and an 01

Okay First question on the 2001 Corolla where is the cabin Fusebox located? We have a blower motor and dashlights and clock not illuminating. Fuses are my best guess. On the 01 how hard is it to bleed the brakes, Change the water pump and, the thermostat because it's leaking from the pump and my guess is the thermostat is stuck closed and it is overheating? Now on the 1994 it is eating up gas horribly like a half a tank a day just running small erronds a few blocks away. These are both my friends cars but I am going to be working on them so I dont know too much, But he had taken it to a shop and the mechanic took the bank 1 o2 sensor out on the 94. My guess is that should be replaced. Along with the plugs and wires. And clean or replace the MAF sensor and throttlebody to fix the gas eating issue. Any objections or projects anybody would add to the list on the 01 or the 94 please let me know I'm trying to not make this a shot in the dark. Both are 4 cyl. I believe

These should really have their own separate threads to help avoid confusion, but the topics involved are general enough that the model differences shouldn't be a hurdle.

That being said, let's start with the '94:

The lack of an O2 sensor causes the engine to run in what's called "open loop" mode. The engine's ECM uses that sensor info to meter how much fuel is used...if there's no sensor, it has to rely on pre-programmed algorithms as if the engine was cold. This will cause the engine to run rich (too much fuel) and could cause early catalytic converter failure if not corrected. Replace it immediately and I think your friend's mpgs will greatly improve.

Other items to help mpgs are the usual tune up items, clean/gap spark plugs, check/replace plug wires, clean/replace distributor cap and rotor terminals, check ignition timing, air filter. Using some Seafoam or Chevron Techron fuel system cleaner should help with cleaning up gum and varnish inside the fuel system. Also, check that the EGR, PCV, and IAC valves are working properly. Any problems with these can cause rough idle, poor acceleration, and low mpg.

Now for the '01:

Brake bleeds are no different than any other modern vehicle...start with the wheel farthet from the master cylinder (right rear) and work your way to the closest (front left). KEEP THE MASTER CYLINDER FULL so no air is sucked in as you bleed. Always use fresh fluid and keep pumping until the old fluid is completely flushed out.

I would do some testing to verify what the root cause of the problem is before throwing parts at it. What are the symptoms?

Replacing the thermostat is somewhat easy...follow the top radiator hose back to the engine...it is located beneath the hose connector. You'll probably have to remove the engine cover, and air intake box/hoses, but otherwise straightforward.

For the water pump, if it is dribbling coolant from the weep hole (you'll have to remove the timing belt covers to view this) then the pump shaft seal has failed. Replacing the pump requires removing the timing belt which typically requires removal of the crankshaft pulley to get the lower cover off. Match-mark the timing belt with both the camshaft and crankshaft gears before you remove it. Other accessories may also need to be removed such as alternator, washer fluid tank, coolant reservoir to gain access to that side of the engine. Once that is done, pump replacement is straightforward. If coolant got on the timing belt, it should be replaced as well (being 8 yrs old it may be due anyways). Transfer the match-marks to the new belt and reinstall is the reverse of removal. There's more tips & tricks to the timing belt procedure but it can be searched for in this forum.

Hope this helps!

Right now the symptoms for the 01 is a small coolant leak coming from what appears to be the water pump, and it is overheating. I will deffinately try getting the 94 fixed first since that seems like the easiest job to do for now. All info is greatly appreciated. I know some about cars but dont go into a job without knowing what I am doing.

'01 Corollas DO NOT have a timing belt. They have a timing chain so replacing them as regular maintenance is not necessary. Timing chains usually last the life of the engine.
The water pump weep hole is fairly easy to see from under the car and it is mounted outside of the timing chain cover.
The water pump is a lot easier to replace on a '98 thru '02 Corolla than on the previous generation Corollas.

Oops. Thanks for catching that bit of info, but the procedure is basically the same with the matchmarks on one side of the chain and gears.. Also mark an arrow noting which way the chain rotates. Loosen the tensioner and remove it from the gear teeth. Lay it on a clean surface so it doesn't pick up any dirt. Reinstallation after you're done with the pump is the reverse as long as the crankshaft hasn't been rotated since the chain was removed. If so, you will have to reset the crank back to its original position...Starting this procedure off at #1 TDC helps keep things in line.

I guess I didn't make my last post clearer.
The water pump is mounted outside of the timing cover. There is no need to remove the timing chain in order to remove the water pump.