I blew up my receiver. Now what?

1. What did I break?  Can't be sure without going in to troubleshoot.  But you saw smoke, A Lot. 
     A fuse? More than likely.
     A capacitor? Probably
     Everything?  No.  The cabinet, foots, panel knob and buttons are still good.

2. What’s the best way to get it back up and running here in Europe?
Get IT back up running?  Money hope and prayers.
Get YOU back up running?  Money.

If it's a receiver you need, in Europe, I would get a Cambridge Audio SR20 or whatever the new series is called. You won't get HDMI inputs, but you will get a competent, multi-voltage receiver for moderate Euros.

Thanks for all the entertaining responses. Sounds like I should have no problem getting it fixed. I've wrapped the whole thing in duct tape, and I'm going to plug it back in...
Actually, if anybody has a good suggestion for a replacement, I'd appreciate it -- my Rainmakers look nice enough, but I'd rather hear them. (But it does have to be a network-capable receiver with HDMI. Surround sound not necessary.)

twoleftears is correct... the repair will cost more or close to a new unit. lucky you this one is not the top of the line . The lesson is priceless!

You pretty much destroyed it.
You need a step down transformer next time, unless the device supports multi voltages.