1) How long will my passport need to be valid for when I travel?

If you're an Irish citizen, you'll need to have a full 10-year Irish passport. It'll also need to be valid for at least 6 months after the date you return to Ireland - although this can vary depending on where you're travelling to. Visit the DFA website for more information.

For all other nationalities, you'll need to check the embassy of the country you're planning to travel to, and with the passport office.