depends on the car. may want to bring it to a car shop just in case (not likely to be a bomb)
the pullee to any belt could be bent
A ticking or clicking sound is probably lifter noise, the valves need adjusting
you may have a bent valve
You have an old car or it's about to be broken.
Is it a lifter ticking?
Starter motor, Flat battery or bad earth cables are the prime suspects
Diff whine
most likely a faulty relay
that would be the car indicator signal! that tells other drivers which direction your turning!
Check the heat shield.
Could be a bomb but cant be sure without looking at it