Does throwing the Jamarat on the second day of Tashreeq before Zawwal entail a Fidyah for one who hastened and departed? And what is the ruling concerning one on whose behalf the throwing was done, as well as one who threw after being informed of its permissibility?

You are not obligated to offer fidyah for stoning before Dhuhr, because you have adopted the view of some scholars, even if it is a less preferred opinion, such as the view of Ata and Tawus, and a narration from Ahmad permitting stoning before Dhuhr on the first day of Nafr, and a narration from Abu Hanifa regarding stoning before Dhuhr on the second day.