Having trouble renting a car in France on Sunday. Hire a driver?

You should look for a car rental company in Tours which is 15 minutes from Amboise by train, Sixt at Tours (Saint Pierre des Corps) station is open on Sundays.

https://maps.app.goo.gl/kxWnJSvvCoCnKi1SA

Also maybe St Pierre des Corps. If it's important to you, pay for Saturday.

Edit: Note 2 hour lunch closures in St P des C!

I agree that a car is as needed in the Loire as in Tuscany. And I don't prefer to rent a mighty steel steed.

You can see if there are any offers on Blablacar, a French car pooling service. www.blablacar.fr

You might find a car useful in Amboise anyway, so you might consider renting for your stay there as well.

There are no car agencies in Amboise. It's a small country town.

The closest car agencies are at Saint Pierre des Corps, and I believe some of them are open on Sunday morning

Thank you so kindly. I just rented a manual Fiat 500 from Saint Pierre de Corps Sixt car rental. I could not be more thrilled. We will be traveling to France for just a couple of days ( after a RS BOI tour ) to celebrate our 45th anniversary. Thank you for all of your tips and guidance!
PS Any advice about how to tell my husband that we are in fact going to be driving in another country? Lol Linda

how to tell my husband that we are in fact going to be driving in
another country?

Don't tell him, it will be his 45th anniversary surprise :))

I believe any drivers will need an IDP from your local AAA office.

https://www.ricksteves.com/travel-tips/transportation/rental-car-requirements

JoLui
I love it! He will be surprised! He will no doubt actually love the experience of driving through the beautiful Loire Valley.

If he will be the driver he will need to obtain an International Drivers Permit (IDP) from AAA before you depart for your trip. If you drive you will need one.