From Latin totum
Tudo isn't Spanish. It's Portuguese for everything. The word in Spanish is todo.
todo/toda
Everything/ All of it.
all = todo
It means "all", as in 'todo el mundo', 'all the world/everybody'
Todo in spanish means all.
Todo lo que haces
This would be "come todo lo que quieras"
The noun "all" is "todos" or todas (the singular pronoun is todo).
"Todo" "toda" or "todos" "todas", depending on gender and number.
todo todas las cosas
Como esta todo?