Thank you for your help...which lenses would you recommend and what do you think about extended warranty?
First lay out a good groundwork to be able to advance your capabilities.
The 18-135 is a excellent starter lens. You can always sell your kit lens later without losing any money, since you get a big discount when its bundled with the camera. It has its limitations, but so do all lenses. Learn them, and how to work around them.
Buy yourself a good piece of software (Adobe Lightroom), and a book to learn to use it. You will get better quality images by learning to use RAW and to properly develop the images than spending money on a lens that might not be the one for you. Lightroom is wonderful, but you will not easily discover all the wonderful features without some training.
Once again, learn to take and develop images using RAW rather then jpeg. Take lots of photos of the things you like. Get a fast SD card, and a fast card reader.
You might also consider a external flash that can be controlled remotely by your 60D.
Then, if you want something different, look at the focal lengths and apertures by using the Lightroom metadata filter. You will be able to see just how many of your images are taken at each focal length, aperture, shutter speed, etc. This may help you to decide on the next step that would be best for YOU. .
Do not go out and spend hundreds of dollars on a lens that might not fit your type of shooting. People will tell you what they would do, but that is of no help to you. Learn and the next step will become clear to you.