You probably need a Lube job. This should be done on alternate oil changes as a routine measure.
Check your power steering fluid or your fan belt could be making noise.
The wheel bearing.
The car may need new brakes or tires because they might be wearing down.
Loose alignment is the most likely culprit. It could also be the servo if your car has got one.
Squeak or whine? Possible that your clutch is going out.
cruise control that is stuck on.
Most likely it is a belt on your car. Usually the squeeling is from a loose belt while idling and will also make noises while driving.
That could be the brake pad "squealers". They are designed to squeal when they are worn out. Time for a brake job.
it does that because it has a generator which makes the engine makes these sounds
Shocks have gone bad ( dried out seals ) or spring shackles loose. have someone bounce the rear of the car while you look under to narrow down the source of the squeak.
it means your brake pads are worn out and need to be replaced
If your car has a manual speedo, it can be in it or the cable. Noises have to be heard to be correctly diagnoised.