Props: Where and How to get them?

I tried modelling(and it seems tedious), I need some ready made simple props like chair, table, pipe,etc., in blender, where can I download them? and after downloading, how can I import them into the blender file where i’m working in?
One more thing, I was trying to animated scene featuring two Ludwigs(from the Jason Pearce’s Model and Rig, Ludwig), It requires me to do something with names and skinning… (of which, as you might have guessed by now, I have absolutely no idea), Please guide me through the process?

By the Way, I don’t need High-Funda-Fancy-Poly-Textured props, just simple ones… for practicing animation.