Yes
Yes.
Yes, u can without giving up you passport, but you can't use it anymore after you've become a citizen of trinidad.
Where are you a citizen? If you are a Canadian citizen you must have a Canadian passport for entry into the US. If you are a citizen of Trinidad, you must have government approval from the government travel authority of Trinidad to enter the US, which means you would need to go back to Trinidad before traveling.
Franklin Almeyda is the Minister Without Portfolio for Citizen Security for the Dominican Republic.
yes there are no border restrictions from the republic,
Ireland
Unless you are a citizen of a country that has a visa-free arrangement with Ireland, you cannot enter the country without one.
yes there are no borders between northern and southern ireland
Dial 00 353 and then the rest of the number without its first zero.
The Republic of Ireland does not have postcodes. You just use the address. That is all you need. If it is on an internet form looking for a postcode, then type in IE.
Ireland. And I believe you have to be a citizen.
If you are a British or Irish citizen you can travel anywhere in the Common Travel Area (UK, Republic of Ireland, Isle of Man and Channel Islands) without a passport. Airlines require photo ID, however.