As long as there is nothing crawling around in it take a bit and chew it, if it tastes stale don't use it, otherwise it should be good to go. I generally don't keep base grain around for a year or more so I can't answer the second question.
"People should not be afraid of their governments. Governments should be afraid of their people." - V
Secondary: Shady Lord RIS, Water to Barleywine, Pumpkin wine, burnt mead
Kegged: Crappy infected mild
Bottles: Apfelwein, 999 Barleywine, Oatmeal Stout, Robust Porter, Robust smoked porter, Simcoe Smash