I own that T3i with the 18-55m lens.
I can set it in full auto mode and it's no effort to take a picture. About the only setting I change is to flip the lens switch to manual focus. The auto focus is a tad slow for my taste. The T3i starter kit was at woot.com today for 600 new.
You'll need some SD card to get going.
I like this model and still shopping around for a better bag for it.