I need to find the right size tires for my car

Remove the spare tire under the hood.
Your dipstick for the transmission (if its a stick) will be under the tire.

it sounds like you have a bad connection on the left headlight either the earth or the power wire,check the connector on the headlight bulb plus all the other wiring & connector plugs.....hope this helps.....cheers.

Mine will have a delay when disengaging and "pop" really loudly. My dad discovered it would disengage much easier if I stopped the car, put it in reverse, and backed up a couple yards. Hope that helps!

There are some sets for sell on ebay motors. good luck.

I had this same problem with mine. The manual said that 4 green tires would light up on the instrument panel letting you know it was engaged and it would not when I pushed the button. I took it to the dealer and it turns out there is a vacuum hose that engages it and it was not connected. So it took them two seconds to connect it and then it worked. This happened again a year later and my dad fixed it again by doing the same thing. This is your problem more than likely. If so and you do get it fixed here's another tip: my dad mentioned that on occasion (even if not needed) engage the 4WD just to keep it "in check", meaning, if I didn't use it, I'd lose it. Oh, and make sure to THOROUGHLY read the manual's operating instructions before using the 4WD feature. Hope that helps!

API-SAE 5W-30 if you drive it below 30 F.
10W-30/40 if driven at 15F to 95 F.

Likely that button changes when converter locks up...one position is "economy" the other is a delay for power.

check the colors of the wires in the door, and look on the back of the radio to see if they are located there too, if so then yes they are connected.

roll in opposite direction for 2 or 3 car lengths

Apparently, their is an electrically controlled, vaccuum servo located below the spare donut tire under the hood which is malfunctioning. It is connected to a lever on the side of transmission, by a cable. A temporary fix is to get the lever to move forward by hand. Jack up the car on the passenger side. Between the two transmission cross members, above the exaust pipe behind the catylictic converter, you will see the lever connected to the cable. Push lever forward towards motor to disengage rear wheels. This will allow you to travel on a hard road until you can get to a mechanic.