Best advice is to go in person Monday thru Friday from 10am-11:30am best time to go there. In order to get a Spanish passport you need to become a citizen of Spain first. This will be a process and is not instant.
If you speak Spanish you can find the information here: - Nationality: http://www.exteriores.gob.es/Consulados/SANFRANCISCO/es/ServiciosConsulares/ServiciosenSanFrancisco/Paginas/Nacionalidad.aspx - Passport: http://www.exteriores.gob.es/Consulados/SANFRANCISCO/es/ServiciosConsulares/ServiciosenSanFrancisco/Paginas/Pasaportes.aspx
Thank you but how do I see what documents I need to become one
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