You will be expected to provide your own tools bar any specialised items...
You want a decent socket set, 3/8th drive set up to about 1 inch in size and possibly 1/4 drive up to about 9/16th, set of spanners to about the same ( 1 inch). pliers, snips, hammers, pin punches, torch and mirror, ruler, screwdrivers, get something like the Snapon Ratchet item with the screwdriver bits....... may cost 40-50 quid, (most companies provide replacement screwdriver bits) but it will last you a life time, on my second in 25 years.... locking pliers, also a pistol grip windy drill for starters, starter selection of drill bits, though most companies provide them, selection of files, tin snips etc and a strong tool box to put these all in with a chain and padlock to secure it to something substantial, sad to say things do go missing
There are people on ebay selling aircraft tools so have a look there for those items you can't get.
Most of the main skin jobs will be left to sheeties, so you will basically want stuff for the more minor repairs etc
I came out the RAF as an A TECH P which was an Engine Fitter, did a bit of contracting picked up airframe skills on the job and learnt as I went along, I wasn't to proud to ask people for help along the way.... I am now a A and C Licensed Engineer, which is Airframes and Engines, A chief Engineer and a Nominated Engineer as well as holding my EASA Licences A1, B1 and C.
Anyone else think of any essential tools he will need chirp up........ not the niceties of life, but the ones he will need to get by and into a company.