6 some: "We've got some great ideas" implies having multiple good ideas, so "some" is appropriate.
7 some: "I want to buy some new furniture" indicates an interest in buying several pieces, not just one.
8 any: "Have you got any luggage?" asks if the person has luggage at all, not a specific amount.
9 any: "Has she got any previous experience of this type of work?" inquires about any experience, regardless of the amount.
10 an: "It takes about an hour to get there" suggests a specific amount of time, so "an" is best.