Answer
Toshack won one UEFA Super Cup with Liverpool in 1977. The UEFA Super Cup is a match between the winners of the UEFA Champions League and the UEFA Europa League. Liverpool won the European Cup (now the Champions League) in 1977, and they faced Hamburger SV, the winners of the UEFA Cup Winners' Cup, in the Super Cup. Liverpool won the match 7-1, with Toshack scoring one of the goals.