How to get a list of webpages from my website?

You can use google's sitemap protocol to check your site for a list of webpages and create a xml file, that will have a list of all of your pages. There is a website, XML-sitemaps.com, that has a free version for websites with less than 500 pages that will generate the xml file for you. If you have more pages than that, you need to consider using their paid version.