hey I wanted to start a push/pull routine that consist of this
Upper body: vertical push/pull
Lower body: Squats, deads, split squats, lunges, step-ups etc
Upper body: horizontal push/pull

does anyone know excerises that i should do in each of my different work out days? Do you think i should go 4 or 5 days a week. id rather have a 5 day a week routine.

4, atleast to start with.
2 upper and 2 lower.

remember, since only working each part 2 times a week, you will need more than just one push and one pull, etc.
Pullups, chinups, pulldowns
push press, military press,

back squat, front squat, overhead squat, bulgarian squat
conventional deads, romanian deads

bench press, DB bench press, pushups, bent over rows, cable rows,

I'm not suggesting all of those each day, just throwing out suggestions for exercises.

this is different but,
if i was to do an upper and lower split,
could i do bench press on monday and incline press on thursday
or should i stick to the same excerises each workout day for upper and lower

don't have to stick with the same. variation is good