That sounds like a lovely meditation Pandorra 
   
 As a Wiccan, I use a brown or green candle to represent the earth, nature, etc - so a green pixie and green energy from the tree explains that.
 I think the young man handing you the medal/coin will be something personal to you.
 The black shadows, I would think of as 'protectors' and as the man then became your guide, I am guessing he sensed your fear and appeared so as to put you at ease.
 Red flowers - Love, passion, good health, energy, action, vibrancy. (We use red in spells for physical strength, love and passion) and red also relates to the root chakra - some people visualise the chakras as flowers.
 The snow covered mountain, which you saw change into a volcano, could also represent something personal to you - such as a problem that seems like a mountain to overcome.
 I hope this helps you make sense of your meditation.
 Did you speak to your Wiccan friend about it to ask her opinion?
  
 Love Raven 
  xxxxx