Magic Forums

Hello, I'm a newbie when it comes to magic so I'd be very grateful if someone answered these questions for me. Is anything from what I'll mention below possible to be obtained by magical means: having a dream about something a person wants to know (for example alternate way your life would go if some things that happened in the past didn't happened), erasing certain memories from the past, or at least negative results they caused (like when someone was abused), getting knowledge about any subject person wants? I hope for reasonable and serious responses about possibility of these things or at least something close to them happening.