I now - it must seem like a dumb question but I do not know?

http://www.batauto.com/tbelt/
provides a reference for repalcing timing belts for all models

every vehicle has one.

it runs from the crank to the cam.

some times referred to as a timing chain...

Yes, it's a timing belt.
The only production volkswagen engines with timing chains is the 12v/24v VR6 engines, the VR5 engine, the 30v V6 and the W8.

And no, not all engines have one.

not all engines like what?

other than rotary...

all internal combustion/piston engines have timing belts/chains...

ohc as well as internal cam motors have timing chains...

Timing gears, used in older pushrod engines and even modern inline engines.

http://www.landroverclub.net/Club/Technic/Zeus_timing_gear.jpg

good enough...

that's like when the v8 hot rodder switch from timing chains to the gear drive setup, and it's all whiney...

....im a n00b when it comes to internal engine parts..................:(
i wanna learn more like u guys!
what is the best way to learn?