It doesn't come with a spare wheel. There should be a tire inflation kit in the boot. Check that the fluid is still in date.
In the boot right at the front there is a flat bit. Lift that panel, underneath is the hydraulic stuff & ecu for the roof, also under there should be the jack & tool bag (wheel nut bar, two metal wire handle things can't remember what else). You should also find in a black bag some tyre gunk & an air compressor. If it's not there ask the seller where it went.
My Copen didn't come with a tire inflation kit or any tools, so bought a portable air compressor on ebay. You mentioned about gunk. What kind of liquid is it , special glue ?
You need to look out for a tool kit then. If your roof stops working there are a couple of little wire loop handles that are needed to manually close/open the roof.
There is a tool kit on ebay, but it dosen't look like the the little handles are in it. http://www.ebay.co.uk/itm/166-2004-...arts_Vehicles_CarParts_SM&hash=item53e4a49599 You could try this place, they are breaking a Copen. http://www.ebay.co.uk/itm/Daihatsu-...arts_Vehicles_CarParts_SM&hash=item3a694d677e