As far as the gauge gos, does it drop and stay there or does it move around a lot?,
if its moving around a lot then i shouldn't worry, mine does the same and you'll also notice that when you're under half a tank your reserve light will flicker on and off intermittently,seems that a lot of these do that.
As for your starting prob,then yes could be dodgy fuel pump or starter motor on its way out. What does it sound like when attempting to start? does it whir over struggling as if you're battery is close to flat? or does it turn over normally.