I would appreciate some clarification, so I'll jump straight in with my query
Page 12 defines combat styles and common magic as Common Skills.
First: Why are combat styles or skills not outlined or summarised at all in the skills chapter - I guess the necessary information is in the character creation and combat chapter. But I have found some confusion over the term 'combat skill' and combat style - please confirm that combat skills / styles are treated as a skill? Why is 'unarmed' specifically listed in the skills chapter?
Second: As a Common Skill, the rules imply you can just open a new combat style at base percentage. However, page 53 (Training Costs Table) lists Combat Skill under the heading 'learning a New Advanced Skill to Base Score'. Please confirm whether combat skills / styles are opened as new advanced skills (per page 51), and whether they must have / require training before being available (per page 52)?
Third: The rules for learning new common magic appears appear contradictory (page 107) - the text notes that a teacher is necessary who requires some form of payment (money or otherwise). However, the table 'Learning Common Magic' refers to spending Improvement Rolls, not monetary value. The optional rule (paying for common magic spells) lists a monetary value as an alternative to paying Improvement Rolls. So, under the standard (non-optional rules) do you need to spend money (or similar) and Improvement Rolls to learn a new common magic spell of increase the magnitude of a known spell? If so, how much money does the training cost?
I appreciate that the actual 'cost' may be in terms of a service and may vary by culture. But, I see Improvement Rolls as the spending of personal time and effort to master or improve a new skill / ability.
I hope these queries are clear, thanks for your help.

Page 12 defines combat styles and common magic as Common Skills.
First: Why are combat styles or skills not outlined or summarised at all in the skills chapter - I guess the necessary information is in the character creation and combat chapter. But I have found some confusion over the term 'combat skill' and combat style - please confirm that combat skills / styles are treated as a skill? Why is 'unarmed' specifically listed in the skills chapter?
Second: As a Common Skill, the rules imply you can just open a new combat style at base percentage. However, page 53 (Training Costs Table) lists Combat Skill under the heading 'learning a New Advanced Skill to Base Score'. Please confirm whether combat skills / styles are opened as new advanced skills (per page 51), and whether they must have / require training before being available (per page 52)?
Third: The rules for learning new common magic appears appear contradictory (page 107) - the text notes that a teacher is necessary who requires some form of payment (money or otherwise). However, the table 'Learning Common Magic' refers to spending Improvement Rolls, not monetary value. The optional rule (paying for common magic spells) lists a monetary value as an alternative to paying Improvement Rolls. So, under the standard (non-optional rules) do you need to spend money (or similar) and Improvement Rolls to learn a new common magic spell of increase the magnitude of a known spell? If so, how much money does the training cost?
I appreciate that the actual 'cost' may be in terms of a service and may vary by culture. But, I see Improvement Rolls as the spending of personal time and effort to master or improve a new skill / ability.
I hope these queries are clear, thanks for your help.