As betty1 and others have said, directory submission is of limited value. Hardly anyone looks at directory sites, so you won't get much direct traffic, and search engines pay them little or no attention.
You can advertise with Adwords, but what you need to think about is how much money you expect to make on each visitor. If it costs you $1 per click, one in ten visitors buy something and you make $5 profit from each sale, that probably isn't going to be worthwhile, because your advertising is costing you much more than the sales it brings in. So it depends how you are planning to monetise your blog as to whether it is worth going down that route.