[Gav]

How high is your roof?
If it is 4m or more you might want to look at discharge lighting (high bays or low bays). They give a much more 'true' light which makes life sooo much easier when working on fiddly things.

I would think one 15amp outlet near a bench would be enough, and 10 amp everywhere else.
I have leads strung up on a wire running the length of the shed which keeps leads off the floor and they can be pulled across to where ever you are working.
I would think that unless you are planning to run a full workshop that a 32 amp 1ph supply would be heaps, but if you have 3 ph run to the house I would recommend that you at least run 3ph cabling to the shed even if you don't use it. It will add value if you want to sell.