last year when i went to southern Ireland even though i was born there i was asked for a passport
Yes.
From where?
technically none but if travelling by air the airlines demand a passport
That will depend on your nationality. Irish and British citizens can travel between Ireland and Britain without needing a passport, though many will bring their passport with them anyway. If you are not from Ireland or Britain, then you will need a passport, and may even need a visa.
Not officially, but you may be asked for ID by Irish immigration officials.
only if you are going to Northern Ireland, you need a passport to travel between England and Ireland.
No, you do not need any vaccines when you travel to Ireland.
No
Not if you are a citizen of Ireland or the UK Citizens of other countries might be asked for passports but in practice this doesn't happen very often. However you should carry one with you.
the answer is no. Wales is like a state inside the uk. so if you travel to Wales, or scottland i don't think you need a passport.
No.No.No.No.No.No.No.No.No.No.No.
Yes
Yes.