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"Todo" is an adjective which is often translated as "all", and "toda" is an adjective which is also often translated as "all". Learn more about the difference between "todo" and "toda" below.
todo(
toh
-
doh
)An adjective is a word that describes a noun (e.g., the big dog).
b. all of 
La única hija de Ibáñez se quedó con toda la herencia.Ibanez's only daughter inherited all of her estate.
d. the whole of 
Al final, el casero nos devolvió toda nuestra fianza.In the end, the landlord refunded the whole of our deposit.
A pronoun is a word that stands in for a noun (e.g., she).
3. (totality)
An adverb is a word that describes a verb, an adjective, or other adverbs (e.g., to run quickly, very tired).
4. (emphatic)
a.  no direct translation
This refers to an idiomatic word or phrase for which there is no word-for-word translation.
Siga todo recto.Carry straight on.
La cocina estaba toda sucia.The kitchen was filthy.
A masculine noun is used with masculine articles and adjectives (e.g., el hombre guapo, el sol amarillo).
a. whole 
Este médico ve el cuerpo y la mente como un todo.This doctor sees the body and the mind as a whole.
todos
An adjective is a word that describes a noun (e.g., the big dog).
b. all of 
Sí, claro que vamos a tu fiesta. Cuenta con todos nosotros.Yes, of course we're coming to your party. You can count on all of us.
c. the whole of 
Perdimos todos nuestros ahorros con aquella inversión.We lost the whole of our savings with that investment.
A pronoun is a word that stands in for a noun (e.g., she).
a. of them all 
Me gustan tus camisetas, pero esta es la más linda de todas.I like your T-shirts, but this one is the nicest of them all.
b. all of them 
¿Vendieron todos los celulares? - Sí, todos.Did you sell all the cellphones? - Yes, all of them.
c. everyone  (singular) (people)
A word or phrase that is singular (e.g., el gato).
Todos saben que Raúl y Fátima están saliendo.Everyone knows that Raul and Fatima are dating.
d. everybody  (singular) (people)
A word or phrase that is singular (e.g., el gato).
Aquí me conocen todos.Everybody knows me here.
b. all of us  (after prepositions)
¡Más fuerte! Vamos, canta para todos. Queremos escuchar tu hermosa voz.Louder! Come on, sing for all of us. We want to hear to your beautiful voice.
toda(
toh
-
dah
)An adjective is a word that describes a noun (e.g., the big dog).
b. all of 
Toda la letra de la canción fue escrita por la hermana de la cantante.All of the song's lyrics were written by the singer's sister.
c. whole 
Te perdiste toda la película por estar texteando.You missed the whole movie because you were texting.
d. the whole of 
Toda nuestra quincena se va en pagar la renta de nuestro apartamento.The whole of of our biweekly pay goes to pay the rent of our apartment.
a. every 
En este país, toda mujer tiene derecho a tomar al menos tres meses de licencia por maternidad tras dar a luz.In this country, every woman has the right to take at least three months of maternity leave after giving birth.
A pronoun is a word that stands in for a noun (e.g., she).