Whatever you do, don't go out and just spend a whole load of money on shiny boxes; it's a guaranteed way to end up with a bunch of kit that will end up in 'new, unused' condition on Ebay in 10 years' time, when you're clearing out the lab and wondering why on earth you ever bought <thing> that looked cool and seemed like a good idea, but which you've never actually used.
Right now, you don't have a specific job to do, so you cannot possibly know what tool(s) will be needed to do that job.
That said, if you have a lab to equip, start with some sturdy, spacious lab benches and flooring with proper ESD grounding throughout. Install plenty of mains outlets. Make sure you have enough good quality, comfortable, ESD safe seating for everyone who will work there; don't ever neglect ergonomics. Put up a whiteboard, and commit to ensuring it will never be the case that all the pens have dried out.
Then, consider who will work in the lab. Do you buy a communal set of hand tools, or a set for each individual person? Think about what the lab will be like to work in this time next year., given what you know about yourself and your colleagues. Will the tweezers all be bent, the soldering tips oxidised, and the hex key set missing a couple of common sizes yet again? Or can you be sure that everyone who uses the same set of tools as you will look after them as though they were their own? Think about lockable storage and tool boxes; good quality tools that are always where you expect to find them, and which haven't ever been abused, are absolutely essential.
Finally, buy the tools you actually need, as and when you need them. You may never need a signal generator, but may find a good use for half a dozen logging multimeters. You may not ever go a week without using an impedance analyser or thermal chamber. Proper crimp tooling for the connectors you commonly use may be worth its weight in gold. Meanwhile, that 2 GHz scope that the bean counters said it was OK to buy ends up getting used once a month, with the 20MHz bandwidth limiter switched on.