Malfunction Indicator Lamp Question

I've had my new 2008 Prius about 3 weeks now and the low fuel indicator light had just come on (first refueling since my purchse).

I was on my way to fuel the vehicle when I noticed that the vehicle seemed to have died (perhaps it was just running on electric motor). As I pulled into the gas station the Malfunction Indicator Lamp came on showing various indicators ...Triangle (Red??) and Check Engine Icon and I think a VCS/ or VSC icon.

There was some audible alarm I heard also.

After turning off the engine and fueling the vehicle and restarting it, there no Malfunction Indicator Lights visable. I drove the vehicle home without any indications of a problem.

Should I have this checked out by my Toyota Dealer or is this due to the fact I might have run out of gas and the vehicle was running on the electric motor only?

I've searched these forums and found some similar posts that make me think it was just due to the low fuel but I'm not certain.

Thanks for any comments on my concern.

Lance