behind the center console close to the firewall
Yes, it is a Golf but VW stopped calling it the "VW Golf... GTI". Just as VW didn't call the R32 a Golf (although it is based on the VW Golf and has the same shape and many common components).
where is vw golf gti engine number
4x100mm
it depands on the year
yes
Reviews on the VW Golf GTI MK4 can be found on Performance Car, Consumer Reports, Car Guys, Car Advice, Review Centre, Scooby Net, Drive and VW Forum.
Sadly your out of luck, it uses deisel :(
5x100 mm
starter relay location
Dipstick should be marked
Allahu Akbar
VW dealership