LÖVE

I need help with coding a character into the game I am using zerobrainstudio an löve2d to try an make a 2d rpg to walk around an attack others but I don't have any experience with the lua scripting I just need the code that would help me put a character on the screen an walking around.

What you need is experience with lua scripting and game development.

Rpg's are complicated, You might want to look into making something simpler just to get your feet wet. A good start is a pong clone or a snake clone. You can also follow some of the tutorials on the wiki.

I need a tool to separate the characters from the sprite image.png what tool is free an I can use
I found some tutorials to get started with hopefully I can learn something here.

Should you not have all your characters on one sheet anyway (Sprite sheet)?

I watched this tutorials and they seem like a great place to start, but maybe you should read or watch some turtorials on Lua first.

https://www.youtube.com/watch?v=FUiz1kL0QtI&t=

The wiki suggests Programming in Lua and the Lua Reference Manual. PIL is relatively beginner-friendly (although it helps a lot if you already know how to program in another language), but the reference manual gets quite technical and in depth about areas you probably don't care about (like the C API). Those two books are how I learned Lua, but if you find a video series or whatever that works for you, then go with that.