Since no one has proof of alien life is is hard to know if some alien races have multiple mouths.
If there are alien races they indeed might have multiple ears.
Yes. Some alien races have multiple heads. But currently, it is unknown.
Yes. Some alien races have multiple hearts. But currently, it is unknown.
Yes. Some alien races have multiple legs. But currently, it is unknown.
No one can know for sure if alien races have multiple eyes, but it is possible.
Yes. Some alien races have multiple fingers and/or toes. But currently, it is unknown.
There is no way to know if any alien races have multiple breasts. There is no proof that alien life exists.
Multiple nostrils would allow alien races to breathe better, so it is possible.
In my opinion, yes. Some alien races have supernumerary body parts (i.e. multiple heads, arms, legs, fingers and toes, etc.). But currently, it is unknown.
Yes. Some alien races have two hearts.
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.
Two pupils in the eye would be eerie,and perhaps some alien races have them.