A half decent drawer box to keep everything in. Halfords do good offers on them.
Sockets & socket wrenches from Sealey – they're cheap, I've abused mine loads, and never broken anything. Snapon might be worthwhile in a Garage, but not for a home user. Get "Wall drive" type sockets, they're approximately 9000000 times better than any other shape. You can easily identify these – the corners of the hex are radiused, so that the force acts on the flat of the nut and not the weaker corners.
Halfords pro for combination spanners.
Knipex for wire cutters.
Whatever screwdrivers float your boat.
Buy cheap mole grips, they're all the same.
Get a blow torch – you'll want this for stuck fasteners, and bending a cheap spanner so you can get at whatever parts the manufacturer's chosen to bury.
I wouldn't bother with buying the big bumper box of tools setups. They tend to have loads of bits you won't actually use. Better to get a good quality range of stuff that will get used for the same money, and add special tools like brake caliper wind backs as you go.
If you must have an adjustable spanner, get a Bahco.