At oil temp sign turns on everytime that i star the car and stops when i beging driving. there is also a loud sound in the engine when sign is on.

Sounds like you need to replace thermostat assy and add new antifreeze and as far as your oil gauge, replace the "oil pressure sending unit". That should solve your problem

Not sure on model but to me sounds like its a dodgey valve lifter when the seals start to go they cannot hold the oil and when there under pressure they basically empty them selves hence when you turn the engine off and restart you get a rattle sound untill the valve fills again as long as the cars running ok leave it untill you have to replace them unless there easy to do sone are sone are a pain

sounds like a cam chirping, cant remember if that was normal for that engine, mine did it randomly, oil light could be a bad pressure sensor, hopefully it isnt your bearings wearing out, good luck i hated this car

the drive band is going out it will stop running pretty soon

If this is a loud knock from lower part of the engine then its the crank bearings, I personally think that the engine is done.

there is a heat sensor that turns fan on when motor temp is to high. ( providing this is a electric fan ) Check coolant level and make sure full as well as the reservoir.Check when engine is cold ( i suggest taking vehicle in for repair or check for temp sensor failure.) I dont know how very loud you are trying to point out but yes it will make a fan noise which might be loud to some. If this fan is a clutch fan then a mechanical funtion takes place turning fan on and off in essence. If clutch is not releasing fan will pull air at all times which also will be like a loud fan sound which will also rob car of some power and mpg. clutch will have to be replaced. ( note the electric fan will not rob car of power or mpg.

Either you have a lubrication problem or a bad oil pressure sender. You need to have it scanned for DTC and do an oil pressure test before you seize your engine.

Try to remove the belt for the ac and see if you still hear the noise, as it sounds like you may have blown the seal or bearing out of the ac compressor , not sure just a guess.

It sounds like your lifters are stuck. Put a can of seafoam or trans fluid in the oil drive it 50 miles or so and change the oil. Use a good oil and see if this helps. If it works it don't hurt to do this everytime before an oil change. This keeps your engine very clean

bad altenater