well.. here's some pics for you to see the difference between Levins and Truenos..
AE86 Trueno (pop up lights) and Levin
AE92 Levin
AE92 Trueno
up to 89 the Toyota Sprinter Trueno came with the same lights as our Toyota Corolla GTS (different bumpers though) and after that (90-91) they looked like this.....
notice how the front lenses got twice as big as the 88-89. :o
As for SR5 and GTS trims.. the GTS is more "optioned" than the SR5 models, and also sportier looking. Different engine, seats and inside trim, power options, etc..