I am an opinionated tool junkie. I have never met a tool I didn't want, and I have purchased many a tool I did not need (and never have used). Somewhere in my DNA there must be crow, because I cannot resist shiny metal objects. You must have, a set of torches both brazing and cutting, compressor, air hammer, ratchet, impact wrench, and drill. don't forget die grinder too. Every socket, ratchet, open end box ever concieved, both metric and standard and if you want to be the envy of the obscure, Wentworth too (see how many Brits we have here). Hammers, chizels, punches, brass drift, brass hammer, brass punches. Welder, parts washer, pressure washer, coffee pot, radio, creeper, drop lights, magnets. An obscenely expensive vise, work bench, drill press, bench grinder, quality jacks (3+ ton) and jack stands (6+ton). Pullers, presses, welder (name your own poison), chain hoist, engine stand, 100 screw drivers, 25 files, pliers of ever description too include snap ring, needle nose, hose clamp, channel lock, vise grip, etc, etc. Torq bits, torque wrenches, feeler gaulges dial calipers, valve compressor, ring compressor, multimeter, dwell meter, vacume guage, timing light, a third drop light. This is still an entry level assortment. Picks, hemostats, tweezers, bolt cutters, tooth brush, wire brush, feather duster (oops, other tool kit). My rule of thumb is, if you need it buy it don't borrow. To me these are a fraction of the necessities and I haven't got into the weird such as ridge reemer. I have all this and more and still have trouble finding a tape measure when I need one.