I did once encounter a failed spell that caused someone's pet cat to moo for about a week.
1. The muggle machines, although it is debatable whether phobia is the right word, because as fears go, it is perfectly rational. 2. I'm not the sentimental sort. 3. Technically, I suppose so. 4. Are there any constables here? It wouldn't happen in Britain. If I did anything foolish the Aurors would take me home and tell my father, I expect. 5. I don't know. I do want to get older, but getting old is something else. 6. No. Both are equally absurd. 7. It depends on whom your creditors are. When in doubt, money is safer, but among friends, that can cause unpleasantness, and you're better off with favours. 8. Share. I say it from experience; having your aunt send you enormous cakes every so often does help with popularity at school. 9. Being stuck in the future can be tiresome, but being without a wand would be far worse. 10. Tell the truth if some good can come of it, but if it cannot, the lie is kinder.