1. The difference is that "me" is a direct and indirect object and it is also a pronoun that we use for reflexive verbs only for the subject "I"(levantarse, cepillarse, acostarse, etc. Me levanto, me cepillo, me acuesto). "Mi" is a possesive pronoun that means: my (mi casa, mi cuaderno, mi vestido, etc).
2. "Te" direct and indirect object, pronoun for reflexive verbs only for the subject "You" (tú te levantas, te cepillas, te acuestas, etc). Tu (possesive adjective) means "your" (tu bolso, tu cuaderno, tu vestido, etc).
3. "Se" direct and indirect object, pronoun for reflexive verbs for the subjects "he, she, they" (ella se levanta, él se cepilla, ellos se acuestan, etc).
1. Me llamo Amy ( llamarse)
2. ¿Cómo te llamas?
3. Señor, ¿cómo se llama usted?