Funny to say that: I was on the fence of leasing a 500e right before I got my current GTI, but one of the major drawbacks was the fact that there was no way to put a rear-facing child seat - with the kid strapped in it...
With current gas prices, a new Prius will be hard pressed to break even its higher acquisition cost over a similarly speced Corolla. Even worse for the Volt, although Chevy does have a few very aggressive leasing offers that probably cover your 13K/yr commute pattern. Similarly with the 500e - but kids don't really fit in the back of it before front facing seats come into play.
The straight gas commuters that are Prius sized, e.g. a Corolla, Civic etc, are usually cheaper and already do ~40 MPG.
The Prius will get you what? ~50 when new? Lets say 50 MPG.
For 13,000 miles / year that is: 13,000 M / 50 MPG = 260 gallons of fuel.
With the straight IC 40MPG car would be : 13,000 M / 40 MPG = 325 gallons of fuel = 65 gallons more per year which @ $3/gal = $195 extra fuel running costs / year. A 35MPG car would cost you ~$335/year more, a 30MPG ~$520
If you were to buy a used 40MPG IC car @ $2,000 less than a used Prius with same miles, you will need more than 10 years at current fuel prices to break even based on fuel running costs. A 35MPG car ~ 6yr to break even...you get the picture: pre-paying $2,000 or so to save fuel in the long run, is just not a sufficient excuse before your start opting for really inefficient cars, which none of the comparable to a Prius IC 4dr passenger cars built over the last 10yr is.
Now, there can be a wild-card at play in your case: e.g. you might need a HOV/Car Pool lane sticker that you get with a specific Prius and most Volt models, at least in States like CA. Many ppl that can afford much more expensive cars actually opt for "sticker" cars and weigh those 45-1hr saved in commute time a day as much as gold. Others opt to pay more than they hoped for to get in a Tesla to get access to that sticker.
Insurance might also be more expensive on the hybrid, based on the higher original cost / higher replacement cost, although insurance models might place a Civic in a "more prone to be involved in accidents" class than a Prius or Volt which might turn the tables on you...an online quote (or two, or three) will answer that.
Maintenance on a hybrid might also be more complicated, but this is highly situational and anecdotal: you might get a golden hybrid with zero issues vs. a lemon IC car that will punish you.