Les quatres timbres, je les met sur l'enveloppe que j'envoie à Emilia ou l'enveloppe auto-adressée ?

and which stamps must i use for my SASE ? Thanks.

Hello ! I'm new on this website and I really want to have an Emilia's autograph, I'm french and i don't know how do this, how many stamps I need to put on my letter for receive a response and what must I put in the envelope ? Thanks.