It really depends on the shop you are working at, if for example you work at a shop that does a lot of Honda products you need any and every 10-12-14-17 mm tool they make, or another example is if you are doing mostly LOFs and flushes your tooling is very different.
Just to give you a real world example, last shop I worked at we did a lot a fleet vehicles, with TPMS systems, on LOFs we had to do a free rotate with a TPMS reset, no choice as the pressure were different front to rear, so every time I did one I had to go get the tool to reset, after I bought my own tool, it saved me a bunch of time, and as we know time is money, I also made money with the tool as I would find dead sensors quick, walk around car with tool scan every sensor, boom .6 to change each bad sensor and relearn. At the shop I am at now, I have pulled the tool twice we do not change tires so resets are it.
For me, Airlift for coolant systems make refilling coolant systems 5mins with no bleeding needed. My quick Autel code reader, no I do not use it for diag work, I use it to determine my direction on diag work, evap code pull into bay, lean code FRTD with Verus pro. My 3 drawer MAC service cart is very handy for the shop I am in now as I have 3 dedicated bays and me and the other tech share a truck lift. MY rechargeable tools including 1/2 Ingersoll Rand, matco nut driver, 3/8 Milwaukee impact, and 1/4 ratchet. Most shops will have a junior tech doing mostly LOF work and will the let you start doing brake work, So if I were you I would start there, a good set of caliper turn in tool along with a dual piston compressor tool.