Oh, you want a choice? sheesh, ok, here comes:
squares: throw away the wooden stocked ones. Keep 3" and 6" engineers. Keep combination. Keep Jap mitre. Framing square is of limited use, I'd have thought - could probably make do with various geometry rules (3:4:5 for marking or measuring diagonals when glueing up). Dunno what a pinch rod is
angle measuring tools: I'd get rid of bevel boss, and probably the wooden bevel. Might consider replacing hardwood dovetail markers with brass ones
measuring tools: lose the 18" rule. Lose the vernier, keep the digital caliper. You're a metric gal, so lose the wooden folder. Consider replacing the alu folder with a 1m non-folder (more accurate)
gauges: Can never have enough of these. These days, I tend to prefer cutting gauge along the grain as well as across, over the normal marking gauges, so you could possible bin the marking, and replace with more cutting. This is a personal thing though, I think - I just find the cutting ones stay truer. Having said that, I have no wheel gauges, so mebbe just loads of those. OK, you got me, I have no real idea on this subject!
knives, pencils and such: Marking knife - you've got left, right and 'v' ones - the 'v' should be enough. Ditch the others. (ok, the 'v' isn't on the picture, but I know you've made your own - i've seen the pics). 1 carpenter's pencil (not sure on this, actually - i never use mine any more - always knife or propelling), 1 propelling one, pref 0.3 mm rather than 0.5 mm - Staedtler do good ones. Centre point good. 2 sizes of compasses? why? bigger size keep, smaller one ditch. Possilby same for dividers, though I can see the attraction of keeping 2 sizes there. Possibly replace the compasses with the type that has a screw-thread to control the span - more accurate. Craft knife always handy. Swiss army doesn't belong in tool chest. Marker pens - keep a couple, different colours.
levels etc: keep em all. Although look to replace wooden levels with metallic or plastic ones in the long term....i know they look 'orrid, but more accurate, less prone to movement due to humidity or temperature. And some modern ones can look quite nice too. (ducks galootish tantrum)
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edit; actually, ditch all the bubbles - they rely on the surface you're working on being level - these are best put somewhere they can be used when you're fixing stuff to walls, or whatever]