Learn Hardcore Icelandic: Þú getur útvegað miða.

Icelandic does not have an indefinite article the way English has a/an. So a bare noun can mean a ticket or, depending on context and form, tickets.

If you wanted the ticket, Icelandic would usually add the definite article to the noun itself, for example miðann.

What does þú tell me here?

Þú means singular you. It is used for one person.

A useful point for English speakers: modern Icelandic normally uses þú as the ordinary singular you, even in many situations where other European languages might use a formal pronoun. The plural form is þið.

What is getur exactly?

Getur is the present-tense, 2nd-person singular form of geta, which is one of the main verbs for can / be able to.

A few forms are:

ég get = I can
þú getur = you can
hann/hún/það getur = he/she/it can

So þú getur is simply you can.

Does getur mean ability, possibility, or permission?