For your first question, any Christian knows this so if you’re a Christian you know the answer to that question. And if not, tell me and I’ll explain.
Have you read the Bible? I ask because it’s sorta an important lesson in a few biblical passages.
Granted, I’m taking your post as one of those goofy ones - asking the question why suicide is wrong for a Christian and asking where suicide is prohibited in the Bible. Either you really don’t know or you’re being snarky or something. If you’re serious, let me know and I’ll answer. I have a gut feeling you’re just being snarky but I’m wrong often and open to discussion.
I’m quite familiar with the Bible. I see no prohibition in it against suicide. Do you have something or not?