First things first:
1. Beer
2. Kitchen table
3. Kitchen sink
4. Parts washing kit stolen from partners baking / cooking collection
5. White Spirit
6. Swarfega
Lube, Grease Gun, Ball Pein hammer, Mallet (plastic one end / alu or copper the other), decent set ball ended Allen keys, 1/4″ drive socket set up to 13mm with Torx and hex bits, Needle nosed Mole Grips, Combo set of open ended / ratchet spanners up to 13mm, Set of Pliers, Set of Screwdrivers, Circlip Pliers, Shifting Spanner (Bahco), Set of Mini /Precision Screwdrivers, Junior Hacksaw, Craft knife, Stanley knife, Chainwip, Cass Lockring and BB tools, Cheapo digital vernier, Bikestand of some decsription.
Not essential but a bench and vice are very useful esp if you are going to change DU bushes (add the Du bushing tool) and or B&D Workmate.
Depends on how much DIY you do around the house (little by the sounds of it or you would have most of these tools anyway 😉