Mage said Vampires Suck(ed his blood)

What would happen if a vampire embrassed/sucked the blood of a mage, changeling, promethean, or a werewolf in human form? They can be quite suductive.

Whatever your storyteller says canon.

In terms of what happens when they just suck their blood, the rules for all supernaturals can be found in this previous topic:

Supernatural Blood

The part about the Embrace is far more difficult, as it runs the risk of ending up in Samuel Haight territory. Generally, that either needs to be evaluated case by case, or is just viewed as something that can't happen - the NWoD usually takes the stance that supernatural templates are fully separate, making it illogical to have more than one. Even minor templates are almost never allowed to overlap with them, as noted by the fact that Embraced Second Sight characters lose their special merits.

NOWOD:

What would happen if a vampire embrassed/sucked the blood of a mage, changeling, promethean, or a werewolf in human form? They can be quite suductive.

Drinking the blood of other full supernaturals results in weird side effects.  Werewolf blood makes you more prone to frenzy, for example.

The embrace doesn't stick with other full supers, which means they die, since you have to kill someone to try it, even if it normally brings humans back.

Minor supernaturals can be embraced, but lose their previous stuff.

As a note though, this is not to say such things (that is Embraced werewolves or thaumaturge vampires) are metaphysically impossible in the WOD, but the game was designed to deny them and make them so rare that players having them is a no-go for anyone interested in playing in the base game.

Werewolf blood is 2.5 times as nourishing as human blood (ie, 2 health levels yields 5 vitae; round down).  You have a -2 to resist Frenzy for 1 night per health level or vitae - can't remember which - taken.