Sweden uses the Swedish krona, not the Euro, and nearly all places accept card payment.
Travel to Lund
The closest international airport to Lund is Copenhagen Airport (Kastrup) in Denmark. It takes about 35 minutes from the airport to Lund Central Station by train. Train tickets can be purchased from the Swedish Skånetrafiken ticket machines or the Danish DSB ticket machines or DSB ticket office in the arrivals hall at Copenhagen Airport.
Note: There is a passport control when when entering Sweden. Make sure to always bring a valid passport when travelling between Denmark and Sweden.