USED TO => can be used verbs like 'be', 'have' and 'live'.
|USED TO/WOULD is used to talk about repeated actions in the past, but don't happen now:
I used to/would go sailing with my grandfather when I was young.
|USED TO/WOULD cannot be used when we want to say how long something took, how many times something happened or that something happened at a specific period in the past. We use past simple to talk about single specific actions:
I went to Japan two years ago. V
|WOULD cannot be used without mentioning a specific time or set of occasions:
He used to play football. V
WOULD isn't usually used with verbs like 'be', 'have' and 'live':
This building used to be a cinema. V