Are there hiking trails

Yes, tons of them. You can choose your level of difficulty although that really isn't anything I'd consider extreme or difficult but the level of effort changes with the path you choose to a degree. This helps to keep it interesting in my book.

Couldn't say, I only go fishing there

Yes... A bunch of nice ones.

Yes

Yes, but smaller scale compared to Will Rogers Park and Temescal canyon, and beyond... lots of great ocean view hikes that way