no. you can believe that god set forth evolution or that god created the pieces that ended up evolving or some variation i guess, but creationism and evolution can't coexist.
There are several types of creationism. Certain types (like theistic evolution, evolutionary creationism) are compatible with evolution and other types aren't.
Yes, you can believe in both creationism and evolution. Creationism is just the belief that everything was created by a divine source. Many Christians believe that God is unbound by time, so a "day" to Him could easily be billions of years, if not more. So, when animals were made in the Christian origin story, that could have been accomplished through evolution. The Bible lacks enough detail in the telling of its origin story that both can very easily exist.
It depends, I find that quite a few Christians take the Old Testament (or pieces of it) figuratively, and believe in evolution as the actual scientific mechanism, or they believe that evolution is how God made different forms of life, and that the 'days' in Genesis are not literal days, but different steps within a sequence.
I guess it depends on what we're talking about. In a society, they can coexist. In some interpretations of the bible, they can potentially coexist, although I'm not sure if evolution fits into the bible or if it's forced to be that way. For example, evolutionists probably wouldn't say that birds and aquatic life were made around the same time and before land animals, although this is implied by the bible.
No not really. Creationism (at least what I think it is) is the idea that humans were just put here all of a sudden. Evolution is definitely not this. I can definitely see people saying God initiated Evolution or w/e like that though