The atheist existential view of ethics is that ethics do not emerge from supernatural sources but from pragmatic sources; a good system of ethics is one that contributes to the healthy functioning of the society which adopts it. In other words, we are ethical because it is useful to be ethical, not because God commands us to do so.
That is not a question. Atheists view friends as friends.
Suffering and dying exist. Existentialism has no part in atheism.
Atheism is NOT A RELIGION. It has no rules. Those are given by morality. Every atheist has different opinions.
What you have described is simply a family that does not believe in gods.
Any atheist is a person who simply doesn't hold a belief in a god or gods. As such, he or she could have any belief about suffering or death, because atheism is not a belief, and it is not dogmatic.
There are no categorically atheistic views on any topic except a general lack of belief in gods. Apart from that atheists are simply people. They do not all think alike and with one mind such as theists. You have confused atheists with theists who generally hold religious beliefs as a group.
The view that says the goal of ethics is doing the right is called deontological ethics.
Atheists have no "standard" position on anything except that there is no-good. All other questions on social order, work, and the existence of aliens is up to the individual. Posing a question on their views is like asking what bald men think of vanilla ice-cream
This does not really have to do with extentialism, But we atheists view sexuality as a healthy part of an adult's life.
The view that says the goal of ethics is doing the right thing is called deontological ethics.
Money and career are different among demographics, so the opinion of such also differs. Secular humanism, as a philosophy, really has no bearing on either; money and your job are objectively measurable and assessed.They are necessary to thrive.
This is a broad topic. Briefly: The average existentialist would take for granted that science can explain the origins of the universe and its eventual fate. Physical cosmologists hold that the universe is governed by physical laws as distinguished from religious understandings of humanity and the universe.