I want to buy a car and I have a 2 month old baby

I'm planning to buy a used car soon and have narrowed it down to three options:

Toyota Prius (previous generation, not the newest one)

Toyota Corolla Touring

Toyota Sienta

We're a family of three and don't plan to have more kids, so it'll likely stay that way. My wife likes the Sienta because of the extra space (also the 7 seats), but to me it feels like overkill. The thing is, this will be my first car in Japan and also my first time buying a car as a parent.

Does anyone here have experience with these cars? If you also have a baby, even better, I'd love to hear how practical they are for family life (using the baby chair, etc)

If anyone recommend another models I'll appreciate too!
I have a 2M yen limit!

by abstract-goni