Car slightly pulls to the left

[aaronng]

Wheel alignments is something i have no idea about. how do i know what settings i want and how is it measured?

Then you should stick to the stock settings that the tyre place will use based on a database of car models. That is the safest. Otherwise, you can read this first to get an idea: http://www.familycar.com/Alignment.htm. The advanced section in the bottom half of that page has good info.

In the front, there is camber, toe and caster.
In the rear, there is camber and toe.

Camber and caster is measured in degrees and toe in millimeters. The tyre shop should use a laser wheel alignment system which tells them the amount of each setting as they adjust the suspension components. On most cars camber and caster are not adjustable without the use of aftermarket control arms or A-arms.