 He was the creator of the Bulgarian school of double bass and the first double bass professor in the country.Toshev graduated from the Music Academy in Sofia/class of Asen Vapordjiev (who was a well known Bulgarian musician, a graduate from the Prague Conservatory/class of Eduard Nani) in 1948 .He continued his studies in the Prague Conservatory with professor Oldrih Shoreis until 1951.