Ford Fusion Hybrid As Toad ?

I see quite a few positive comments about the Fusion Hybrid as a 4 down toad.I am looking to trade my MXZ AWD for something similar that is towable 4 down. Any comments good or bad would be appreciated. My concerns about paying more for an electric car may or may not be justified as I am ignorant to what a Hybrid really is.

1. Do they really get the advertised fuel mileage in mountainous and hilly terrain?
2. Do they have the same power as a gas only model?
3. Do they need to be plugged in at night?
4. How far do they go on a battery charge?
5. Battery life and replacement cost?

Thats all for now.

Thanx