Use the toolbar only as a guide as it is not a true reflection of PR, links = PR so work on quality and relevent inbound links, it is unlikely for a website to get to the top of competitive search if there are no relevent inbound links from quality websites, in addition page rank flows through your website so if you want your internal pages to feature then you need page rank at the entry to your website and remember it diminishes as it flows to lower tiers. Remember just because the toolbar says you have zero page rank it doesnt mean you have no page rank.