12 volt electric fuel pumps are common. Carter makes a good high-volume one for about $90, but it's still going to be slow compared to pouring. Maybe a gallon a minute or so.

I just use a regular siphon hose with a squeeze bulb. Some are cheap and crappy. I got one at Walmart, this one, I think: http://www.walmart.com/ip/Pennzoil-Siphon-Pump/16795103, and it works great. It was about $10.

David