Newry to Landsdowne Commute

[aWotW]

I am considering a commute from Newry to Landsdowne Road.

Would anyone know the following?

(1) The Irish Rail Ticket machines do not offer me a weekly ticket to Newry.
I assume I have to buy a weekly cross border ticket at a ticket office?

(2) Can I, on a Thursday at the ticket office in Landsdowne Road, buy a weekly ticket for Newry to Landsdowne and then make the first trip using that ticket from Newry the following Monday?

(3) Does any one know the price of a weekly ticket from Newry to Dublin, bought in GBP in Newry?
The Translink site does not seem to give the price.

(4) I've been looking at the taxsaver.ie site.
I saw the following on the leapcard terms and conditions page
"Certain adult Tickets such as monthly and annual Taxsaver Tickets cannot be used on this card and must be used on a Personalised Leap Card."

I guess leap cards will not work in Newry.
Assuming I was eligible and able to purchase an annual tax saver point to point trail ticket, would I get a paper ticket that I can use in Newry?
Could I also as part of the purchase get a leap card that will let me get off the Enterprise and go straight to the Dart?
Or would I have to get a paper taxsaver ticket from Newry to Connolly and a seperate leap card to use on the Dart?