While I am transformed as a werewolf, will my regular stamina amount be used or does my werewolf form have its own unchangeable amount of stamina?

You get a +100 bonus to your stamina while you are in werewolf form. I'm not quite sure, but it also seems to recharge faster for me.

It charges faster in werewolf form and you get +100 hp and +100 stamina in werewolf form.

Thanks, that's what I needed to know, also, is sprinting in werewolf form just as fast as a sprinting horse?

Its faster than a horse

being a werewolf is the quickest way to cover huge stretches of land outside of fast travel.

OK that's excellent, and sorry about this but I just thought of one more question. If a non hostile NPC starts attacking me after he spots me on a random road while I'm in werewolf form, will he stop attacking me if a go back into my human form in front of him?

If a non hostile NPC starts attacking me after he spots me on a random road while I'm in werewolf form, will he stop attacking me if I go back into my human form in front of him?

No because it knows your a werewolf.