Aside from believing Jesus Christ is the son of God and the savior, the Bible is the holy word, and that you must be saved by Jesus, I don't see what else there is to determine something is not "real Christianity".

Catholics make up the largest part of Christianity though.

Creationism is a very broad term. Ask ten different Christian denominations what it is and you'll get ten different answers. So I suppose it depends on the particular branch in question.

Your actions and life choices are what define you as a proper Christian, it's easy to just believe in God and accept Jesus as your Saviour.

Yes I know, but I think it is a sin in itself, as it is stated that we shouldn't idolize figures (saints, Mary etc.), and many of the high up figures in the Vatican are corrupt.

Idolizing figures that did great things during their lives is a good thing, how is that not "real Christianity"?. Catholicism is the original branch of Christianity as well, while the other ones have broken off from that one and created new rules.

I'm confused as to how your actions relate to the ideology of evolution..?

Yes, an ancient alien species created life on earth, not god.

Yes.

Someone could just say god created everything through the process of evolution.

Yes they can. The same way you can choose to put peanut butter on fries, it'd be edible, but it'd look stupid

Some religious people say God created all species through evolution, so the answer is yes, they can co-exist.

Yes.