\version "2.18.2"

\book {
  \markuplist \table-of-contents
  \score {
    \tocItem \markup test1.1
    \layout {}
    \midi {}
  }
  \score {
    \tocItem \markup test1.2
    \layout {}
    \midi {}
  }
  \score {
    \tocItem \markup test1.3
    \layout {}
    \midi {}
  }
}

\book {
 \markup {
   \column {
     \fill-line\fontsize #2 { "Table of Contents" }
     \fill-line { "test2.1" "2" }
     \fill-line { "test2.2" "2" }
     \fill-line { "test2.3" "2" }
   }
 }
  \score {
    \tocItem \markup test2.1
    \layout {}
    \midi {}
  }
  \score {
    \tocItem \markup test2.2
    \layout {}
    \midi {}
  }
  \score {
    \tocItem \markup test2.3
    \layout {}
    \midi {}
  }
}