Yes. Some alien races have three fingers on each hand.
Yes. Some alien races have two fingers on each hand.
Multiple fingers on an aliens hand is possible, but no one can know for sure until they meet one.
Probably. As nobody has discovered an alien life form (yet), we can't be certain that they would even have hands. However, the possibilities are so vast that there probably would be a few with eight fingers on each hand.
No matter how often you ask, the only honest answer is that nobody has found ANY alien races so far, so nobody really knows anything about them for sure.
it is possible, but we don't know for sure untill we meet one or get an image from the hubble space telescope.
Yes. Some alien have hand-shaped heads.
To be pedantic: on one human hand there are four fingers and one thumb. But commonly it is five fingers.
No, having a different number of fingers on each hand does not make someone an alien. Genetic variations and mutations can lead to unusual physical traits, but they do not determine a person's species.
The characters in The Simpsons typically have four fingers on each hand, a typical feature in animated cartoons to simplify drawing.
A normal woman with 5 fingers in each hand.
12 fingers-6 on each hand