First off, welcome to the tribe
answers to your questions:
-Yes you can most certainly eat breakfast, no reason why you shouldn't be able to.
-I eat dessert every day, mainly a chunk of 75% or higher cocoa Chocolate or a fruit puree. so go for it! so long as its a healthy dessert and not loaded with refined sugars and flour.
-I found that eating a little pre-workout and waiting 30 mins or so then doing my full workout then coming home and eat my main meal worked best for me, but everyone works different in this regard. Find what suits you and stick with it. This lifestyle is very flexible.
best of luck to you on your journey to becoming 9 stone 7!!