you need to tick the first box if your spouse is a British Citizen or has indefinite leave to remain or enter in the UK.
section 7, both of your incomes or savings or either your or your spouses savings or incomes can count, so it depends on your personal circumstances. Both you and your spouse's details may be inserted or either of you or your spouse's details may be inserted.
all the best
Sorry, I am not able to speak on the phone.
2.2 no, it is not the first time
2.3 it is the first period of leave to remain following initial grant of entry clearance so tick the first box
you our should only include your spouse's salary as it is sufficient to meet the criteria, your details you should leave blank.
You should leave 7B blank as it does not apply to you as you fall under 7A.
All the best
What is your question