I've been working on bikes for a long time, but most of the tools I've purchased have come when needing to work on a particular mechanism or area, e.g., overhauling a bottom bracket involves pulling the crankset, lockring/adjustable cup/fixed cup removal; overhauling hubs involves freewheel/cassette removal, cone wrenches, small adjustable wrench. Of course, there are multiple variations of these tools based on country of origin, time period, manufacturer spec. So, to the OP, what bike are you intending to overhaul?