Your dream seems rich with symbolism and reflects various aspects of your subconscious mind. Here are some interpretations of the key elements:

1. Change in Familiarity: The dream begins with everything around you feeling different while your family remains the same. This could symbolize feelings of instability or change in your life, perhaps relating to your social circle or personal identity. You may be experiencing a transition where your friendships or relationships are evolving, and this can create a sense of loss or confusion.
2. Losing Teeth: Losing teeth in dreams often relates to feelings of powerlessness, fear of aging, or concerns about one's appearance. It could also symbolize a loss of control in your life or anxiety about how others perceive you.
3. Conflict with Friends: The interaction with Yazzy, who looks familiar but is different, suggests feelings of betrayal or misunderstanding in your relationships. Her reaction to you may reflect your fears about being judged or not being accepted by those you care about.
4. Theft and Vulnerability: The Mexican boys stealing your belongings may represent feelings of vulnerability or helplessness. It could also symbolize a fear of losing something valuable, whether that be trust, security, or personal identity.
5. Seeking Help: Your attempt to confide in Libby and receive assistance reflects a desire for support during difficult times. The fake $100 and real $20 might symbolize the disparity between perceived help and actual help, suggesting that sometimes people may offer superficial solutions rather than genuine support.
6. Parkour and Escape: The parkour scene with Zac Efron suggests a desire for freedom and the ability to navigate challenges creatively. It may also indicate a need for companionship and support in facing life’s hurdles.
7. Philosophical Speech: The speech about the image we see not representing who we truly are highlights your introspective nature and desire for deeper understanding. It suggests a struggle with societal expectations and a wish to convey authenticity in a world that often emphasizes superficiality.
8. Richard Burton's Appearance: The appearance of a classic movie star, like Richard Burton, could represent a longing for nostalgia or the wisdom of past generations. It might also symbolize the idea of charisma and the importance of storytelling in navigating challenges.

Overall, this dream seems to reflect deep-seated anxieties about identity, relationships, and external pressures. It encourages you to explore your feelings about change and to seek genuine connections while remaining true to yourself. Consider reflecting on any current changes in your life and how they affect your sense of self and relationships.