"Would" is used as the past tense of will to talk about past habits and typical characteristics. For example,
1. The old man would sit in the corner talking to herself for hours.
2. Yesterday! He would come here.
3. When we were kids we would go playing on undays.
"Used to" is also used to talk about a constant or frequent practice in the past. For example,
1. I used to be an administrative manager.
2. When I was a boy I used to like playing sport.
3. We didn't use to go out much in the winter months.