I have a whole crapload of car tools, the only problem I have is that the open end wrenches I have are not narrow enough, so I need to find some narrow open end's in middle metric size.
My advice is to buy what you need as you need it rather than buy a full kit right away.
I have a home depot wall mounted bike rack that I use as a stand, the kind that has a wishbone shaped cradle that folds down and holds the top tube. The only thing it doesn't easily work for is read brake adjustments since the rear brake cable runs under the top tube and get held by the rack.