Hmm... what are your criteria?
The 1st Gen is a sedan, the 2nd gen is a hatchback. Which do you prefer?
The 2nd Gen has a lot more safety features (6 airbags, VSC, Brake Assist, TRAC, Tyre Pressure Monitoring System on 06+ models). A Backup Camera is also available which may help your teen driver learn (just make sure she doesn't rely on it!).
Gen I:
- smaller, easier to park
- it's a sedan with a trunk
- cute factor (maybe your daughter would prefer that design esp. in Aqua Blue)
- Cheaper to buy cause it's older
- hybrid warranty near ending (2009 for the 8 years if it hasn't reached 100,000 miles yet)
- weaker (in terms of power)
- tyres need to be XL rated which may limit the choice of tyres available
- no pass through for longer items
- Only a decent set of safety features (ABS, dual front airbags, TRAC)
Gen II:
- updated HSD powertrain
- hatchback design for maximum flexibility
- lots more safety features
- more "normal" wheel/tyre combo
- hybrid warranty still in effect
- might be more costly to purchase
If you're looking at the Gen I, I'd say 2002 or 2003.
For a Gen II, 2006+ because that adds the tyre pressure monitoring system, advanced front airbags, front passenger occupant detection system and higher resolution screen (for models with backup camera). For 2007, all cars came with side/side curtain airbags as standard so if you don't want look for an 06 and then wonder whether it has side airbags or not, then go with an 07 since they all have it. Just make sure your used Prius has VSC.
If you need help on different packages and changes made to each year, go here:
http://priuschat.com/forums/knowledg...countries.html