I would like to get List of Tables (lot) and List of Figures (lof) in Table of Contents (toc) a book in the quarto pdf format. I have the following YAML code in my _quarto.yml file. I’m curious about the approach to achieve this.

project:
  type: book

execute:
  echo: false
  warning: false
  
book:
  title: "Title"
  author: "Author"
  chapters:
    - index.qmd
    - Ch01.qmd
    - Ch02.qmd
    - references.qmd

bibliography: references.bib

format:
  pdf:
    documentclass: scrreprt
    toc: true
    toc-depth: 3
    lof: true
    lot: true

>Solution :

Use the latex package tocbibind. From the package documentation,

The tocbibind package enables the titles of the Table of Contents, the List of
Figures, the List of Tables, the Bibliography and the Index all to be added to the
Table of Contents. By default, all of these document elements, if they exist, will
be incorporated into the Table of Contents.

So it will include the title Table of Contents too, which probably you do not want. To disable the inclusion of Table of Contents, use nottoc as classoption.

project:
  type: book

execute:
  echo: false
  warning: false
  
book:
  title: "Title"
  author: "Author"
  chapters:
    - index.qmd
    - Ch01.qmd
    - Ch02.qmd
    - references.qmd

bibliography: references.bib

format:
  pdf:
    documentclass: scrreprt
    classoption: nottoc
    toc: true
    toc-depth: 3
    lof: true
    lot: true
    include-in-header: 
      text: |
        \usepackage{tocbibind}

And the ToC looks like this now,