San Isidio station.

Just been to the railway station and come away a little confused. Ok, being 80 years old doesn't help, no one about so couldn't ask anyone. So, looking at the machine, there are 4 buttons across the top, I put my palm on the 9" screen. First button had 4 arrows pointing inwards, second was for cash ( how much to Alicante for day return?) Third was credit card and fourth was for bono card. Do I simply put my credit card in the slot, and then I want 2 people. Been caught out before the inspector had us for going wrong direction, the ticket was wrong.

Never use the machine always pay on the train

Is there parking at the station?
How safe is it to leave your car for a few days ?

Yes plenty of Parking but not sure abought safety I only leave mine there for a day never had a problem