Well, ..Isn't it good to hear for once that a company is taking on an apprentice?? Your a lucky guy in this present economic climate, and this apprenticeship will stand you in good stead for the future. You have fallen on your feet as to the project you'll be working on too!! You can't get a better all round experience than a decent sized hospital project. That project will cover just about everything you'll need to know about, from simple distribution circuits, ELV to MV, HVAC, Boilers, motors and motor controls, etc ....along with specialised earthing arrangements such s IT, in the classified medical rooms. The more interest you show, the more help you'll receive from the old hands, ...that's always been the way. Before too long, you will be a well rounded and Qualified and Experienced Electrician, that is becoming more and more of a rarity rather, than the norm as it once was!! ...Good luck to you...
As for tools, as the others have said, just start off with decent pairs of snips and pliers a set of decent VDE screwdrivers, a Good hammer, junior hacksaw, pair of grips, is about all you'll need for your first week on the job. Personally, i would also invest in at least a half decent volt tester, for your own safety. The electricians you'll be working with will let you know what else you'll need as time goes on.
Like Tony, when i first had any need for hand tools, they were all provided for by the company, and a pretty comprehensive kit it was too.... lol!!