First Time Yaris Owner

[hmsiegel]

Purchased my first Yaris about a month ago. Black 2015 LE 5 dr. So far I love it. It's zippy and gets great gas mileage.
Two questions for anyone out there (though I don't know if this is the right place to post them):
1. I noticed when I bought it that it doesn't come with an arm rest, which isn't a huge deal. But what I didn't realize is that the cup holders are in a terrible spot and are very small. None of my coffee travel mugs fit. Does anyone have any suggestions? Is there a center console type part that I can buy that would fit over the e-brake that has larger cup holders?
2. The salesman said something about activating Sirius XM with the stock radio. Is that even possible? I have a Sirius XM subscription, and really miss it since most terrestrial radio is terrible. What are my options here?

Thanks