how can i download contacts to my new iphone

If your contacts are in iCloud Contacts, they should sync as soon as you set it up on a new device. See: Set up iCloud for Contacts on all your devices - Apple Support

If they don't sync, the following may help: If your iCloud Contacts, Calendars, or Reminders won’t sync - Apple Support

I would like to download my Apple contacts that were previously created as well as deleted.