Just to close the loop on part of your question above, Tá Gaeilge agam means (literally) "I have Irish", following the idiomatic pattern which Breandán explained above, but that is a common way to say that one "speaks Irish" (or any language: Tá Bearla agam - "I speak English").

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I'm not a native (or entirely fluent) speaker, so be sure to wait for confirmations/corrections, especially for tattoos.

Cuir i dtaisce é sa bhosca.

Cuir i dtaisce... is used for Put away... (It means literally 'put in store...')
Cuir do chleathainisí i dtaisce. - Put away your things.
Cá gcuirfidh mé iad (i dtaisce)? - Where will I put them?
Cuir (i dtaisce) iad sa bhosca sin. - Put them (away) in that box.

Hope that helps. Someone else will probably be able to explain it much better.

GRMA! I appreciate these great answers. Extremely helpful!

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Brand new Irish learner inclined to ask questions. Writer, Words & Worlds of New York, a website about language-learning. http://www.ellenjovin.com

Since you are doing prepositions take a look at this thread

viewtopic.php?f=28&t=1375&hilit=prepositions

Just a few mistakes I noticed in my 1st answer:

ar an gcat (in Munster), I have "ar an gcait" written down.

And

http://www.nualeargais.ie/gnag/praepos.htm

gives a breakdown of the prepositions.

In Munster they usually use the form "aig(e)" for the preposition "ag" in Munster:

aige for ag
aige'n (for ag an)
aiges na (for ag na)

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Please wait for corrections/ more input from other forum members before acting on advice