Great advice...
I dont really find the "get the cheapest lens" advice work for everyone. Some people get into photography as a hobby, something to do and mess around for fun. Others want to take it more seriously and dedicate more time and effort into it. For the former, I say, get the cheapest lens to do the job. For the Latter, I tell them the benefits of better gear (17-40L vs 18-55 EFS) and tell them if they know they are going to get the better gear in the future, might as well get the best they can afford so they have more time to use and learn it.
The other piece of advice i can give is to be patient in your learning of your craft. Get just 1 lens and shoot it for a few months and resist the urge to buy new lens. Trust me, when you start out in photography and buy 3, 4 lenses in your bag, you will be overwhelmed. You spend more time guessing which lens is best for your current shooting situation and that is not the way to learn photography. The best way to get to each lens in your camera as well as you can so when you get to a shooting location, you can envision the shot and know which tool to use. The thing about photography is training the eye not about getting the more lens.