Go to your profile and click Photos below your cover photo. Click Albums. Click the album you want to share. Click in the top-right corner and select Get Link. read more
your old post will not set to friends only If you change your posts to friends only. so you need to change your old post to friends only. Facebook has gave a option for that. go to below link and click on "Limit Old Posts" button. that will change your all post to friends only. read more