#1 is how the T-1000 first looks in the film. Regular cop uniform with dress shoes, utility belt (guns holster, accessories), and regular dress pants.
#4 is how the T-1000 appears at the end of the film at the Steel Mill. He's glitching up so he has the top half of the regular cop uniform and the bottom half of the Motorcycle Cop look (regular pants belt, motorcycle pants with reflective lines on the side and motorcycle boots).
Oh wow I love this collection. You have a really good eye DiFabio. I used to have so much of that batman stuff as a kid including the batcave and batmobile. Why must parents feel the need to throw out everything?