5 to 10 minutes in a taxi.
Santry, Northwood, It's safe. Clampers at work but you can pay a small fee by phone to park if you have a car with you.
Swords and Dublin 9 are easiest for you.
Taxi fare estimate €10 to €15
You'd be in the city centre in 15 to 20 minutes in a Taxi.
Dublin 1 is easiest for you.
Further in but not much is Dublin 7
Taxi fare estimate €30
Going in a different direction on the M50 motorway (ring road around Dublin)
is Dublin 11 and Dublin 15.
Taxi fare estimate €30
Once in Dublin 1 or Dublin 7, a 20 minute walk will get you to Dublin 2.
That's about as far as I'd venture unless you really want to see someone particular
Please note these are my guesses going by memory, but they should be reasonably ok