All you'll need for the first week is uniform for the day including boots and hi vis, second week you may need a little more but you'll have your van then so easier to bring it all.
There are no right or wrong on the boots some prefer the industrial looking others prefer the all leather looking ones.
I guess they tell you to bring everything just incase there are issues but I really doubt youll need more than tops and and trousers maybe hi vis but that's only for when you pick up your van.
I seem to remember reading that you needed hard hat, goggles and gloves for the kinetic lifting course but we didnt use them at all.
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