Another point is that you can buy the body without lenses at B&H or Adorama while you can only buy kits at Costco. Contrary to what hatidua said, the Canon 17-55 and 55-250 kit lenses have been highly rated for image quality. Check the tests at dpreviews. However, I will repeat that I found the 55 mm transition point to be a critical one and found myself constantly switching lenses. I prefer zooms that overlap so you don't have one critical transition point where you MUST swap lenses. Buying at B&H and Adorama means you can buy the body and a single focus lens as hatidua recommends or a workhorse like the Tamron 18-270 or Canon 18-135. I grew up in SLR photography with a single 50 mm lens but quickly transitioned to a 28-105 Vivitar One zoom (this was in the "old" days of film so you have to apply that conversion factor for cropped frame sensors). hatidua has paid bills with his photography while I'm just an enthusiastic amateur but I know a number of professionals that use zooms and recommend them for budding photographers.

When you can afford more, the Canon L-series lenses are pricey but just incredible glass for your photography.