removing the engine do i need to drain the fluids?

My engine has rust from being by the ocean. i need to de-rust it, do i need to drain the fluids? i also need either a good video that has step by step instructions or one with pics. Everyone tells me to buy a new engine but i can't afford it. Is it worth all the trouble?? i believe so. So, can you please help me with this issue? I'd greatly appreciate it. I'm a female and i would love to prove to these idiotic men that i can do this. Thank you for your help.

Kristie-Anna