Past habits/repeated activities

We used to set off very early in the car

We would set off very early in the car.

One summer we drove all the way to Spain

One summer we would drive all the way to Spain.

One summer we used to drive all the way to Spain.

I used to think it was amazing that Mum and Dad could find the way. 

I would think it was amazing that Mum and Dad could find the way.

We wouldn't have GPS in those days.

We didn't use to have GPS in those days.

I used to buy presents for her last birthday