AUX/MP3 on a 05 yaris

[teapot]

Hey there,
I just bought a used yaris, year 05 as my first car.
Wanted to ask if there is a way that i can make my car radio support MP3/ add an AUX cable to the original radio

My yaris has the older type of systems, where the audio is connected to an upper display that also shows your gas usage and things like that

I would love to hear anything else that i might like to know as a new yaris owner.

Thanks,
Tea.

[teapot]

Oh, and the dashboard type i have is same as here
http://www.fitaudio.com/?View=entry&EntryID=45

Just rectangular buttons and not rounded ones.

Any idea anyone?