Anna - It starts with the atmosphere or values you grew up with. But the transformation to an office suggests it is something you are now working on. The person you do not know is an aspect of your experience you have not yet defined. Your father is all the traits and life lessons you gathered, mostly unconsciously from him. They are a part and a guide in what you are deciding and working on. See
http://dreamhawk.com/dream-encyclopedia/the-conjuring-trick/The sugar bags are probably ‘sweet’ life experiences that are now empty, and that is why your work force, or forces to work need attention. Then you look beyond your usual habitual thinking and catch sight of an old realisation - the old man - “I have seen him already”. He/it has a message for you - you are a lucky lady.
You open the door to the realisation, a wonderful thing to do. As he/it comes more fully into consciousness you realise that it is full of young energy and he/it becomes a ‘big’ thing in your life. And who do you remember even years ago who wore such brown shoes?
“I think it would be impossible for me to reach for it in order to sit on it, because it is way much higher than I am!” Nonsense - you are much bigger and more wonderful than you let on.
Tony