Key 
To dream of keys may represent a multitude of facets in the dreamer's life, including hidden secrets, recognizing responsibility, the ability to gain access to a situation and hence control, and opportunity. The dreamer may be keeping thoughts, feelings, or emotions to themselves.
When a key is lost, the dream is indicative of fearing the loss of seniority, rank, or self-control.
When a key is given to somebody else, control, responsibility, or secrets may be getting passed on to somebody else.
Finding keys in a dream is akin to solving a problem in life.
Broken keys in a dream mean that your life is fraught with arguments and a separation may occur.
The sound of keys rattling in a dream is indicative of optimism about life and a feeling of control over the direction you are taking in life. You can feel confident that you are making good decisions.
Keyhole
In a dream, a keyhole is an insight. When you look through a keyhole in a dream, you are learning a secret about yourself. On the other side of the door might be a hidden memory from your past, or a clue about your current life.
Keyboard
To dream of a keyboard may be suggesting that too much energy is being put into the internet at this time.
A dream of great joy in direct relation to a keyboard could mean that there is benefit to be found in a career connected to words or writing.
Key Chain
To dream of a key chain is a symbol of opportunities about to become available to you. Note the type of decoration on the key chain - a sentimental object may mean the opportunity to succeed with a close colleague or family member.
Dreaming of a key chain dangling in a lock suggests a sudden surge of courage and the prospect of exciting adventure.
Key Maker
To dream of a key maker is a fortunate omen in regards to your reservoir of personal innovation and imagination.
Speaking to a key maker in a dream indicates that you have the power to uncover the solution to any problem you may be currently experiencing in your waking life.
Saxophone
To dream of a saxophone represents that you are harboring unresolved feelings that you need to convey. Perhaps someone has greatly influenced you or changed your life in some way.
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