Does anyone know how to default all the game rules and how to default the mods, I just want to play classic toribash.

I guess you mean singleplayer?
/set mod classic

Now theres green walls that are moving towards me.

How Do I default the game rules?

Don't double post, use Edit Button.

To get the Classic Rules and Game Mode, just do this:
1-Press T to text/command box.
2-Type /lm 12
3-Press Enter Button.

PS: /lm is the command to load mods, and, as 12 mod doesn't exist, classic will be loaded. Same works for other non-existent mod names.

another easy way to do it is press esc click tutorial then esc press singleplayer

[thats how i do it]

Um... or go to mods -> default?