Bike Repair Stand
(Optional, and helpful)
Bike Stand Review

Bike tool kit including:
Hex key wrench set
Spanner Wrench
Freewheel remover for Shimano
Crank puller
Cartridge B.B. tool for Shimano
Chain Tool
and more (choose a kit that works on your bike's components)

My old friend Blue Loctite, if you know me, I rarely if ever install a bolt or nut without a little blue thread locker.  It is available in other colors, but for bike parts blue is best, blue is removable with hand tools, where as colors like red (heavy duty) can require heat to break the bond.