On the t3i you'll be doing a timelapse with stills. You're going to need to buy an intervalometer. You can get a cheap one for about 30-50 dollars compatible with the Canon brand.
Using the intervalometer, you tell your camera to take a picture every X seconds. The settings for that picture should already be fed into your camera in the manual mode.
If you are going to use 24fps as your frame rate then you need to take the number of pictures for the amount of seconds you want ur video to be. Between the ISO and the shutter speed and the aperture and the interval, timelapse becomes an art in handling those aspects to get the kind of motion and image quality u want.
Once you have the pictures, you batch process them in photoshop or use AE or whichever program you like. Then you conform those stills in your video editing program as a video, add your sound and export.
But you're settings are going to depend on how you want your motion to be, depending on ur subject, while retaining image quality.