You might want to hold off on buying a lot of tools until you work for a few days to see what types of work they expect you to do. IMHO, only buy quality brand name tools (Klien, Ideal, Greenlee). Many tools look the same, but don't perform or last the same.

For your first day, a tool belt, good wire strippers (Ideal t-strippers are cheap, but work great) don't get a multi function stripper, KLIEN linemans pliers, a set of screwdrivers any rand will do if you're on a budget, but you'll want kliens soon. A good tape measure (Fat Max). These will get you through the first few days until you see what they expect of you, they may expect you to master the use of a shovel, in that case a drill would be useless.