Well you've bought it now....
Service intervals are every 3500 miles or so after the first one. Fuel economy can be perfectly decent, I get something like 45-48mpg on my commute and that's pretty much all London, as soon as you get some momentum it'll get better than that assuming you ride with a little finesse.
Service costs are fairly average for the type, there's very little in the way of big nasty suprises, just altenating minor and major services. I'd invest in some kind of auto chain oiler such as the
scottoiler. I would also have a look at a corrosion protector such as ACF50. There are other products for both the rolls above, but these ones have been tested over many years and found to work for the majority of people very well.
We live in happy times as far as tyres go. 10,000 miles from a pair of sports-touring tyres is not unachievable, pick ones you like the logo of, everyone has their own opinions, few of them based on riding with each tyre in a similar state of wear back to back.
Jambo