i usually try to stick some kind of bag on my cruisers, but usually the only thing for sure in them is a poncho. one bike has a small pump, but no patches. some bikes have slime in the tubes.

for tools mainly i carry a leatherman type pouch on my belt, so whatever bike i'm on (or motorcycle, walking etc), i have it with me. it has the vice grip version of a leatherman and a 6" adjustable wrench in it (the wrench goes where a mini mag light should go), along with a couple other little multi type wrenches i picked up along the way. barring a catastopic break, they're usually enough to get me home.