Traveling by train and bus in Spain?

I've always just gone up to the ticket window and bought them. Seville to Cadiz is a long trip and from Cadiz to Granada is not any shorter. Both trips are certainly do-able... and quite nice... but they are long. Just wait until the trip and buy your tickets at the window... just allow a little extra time because you will be fighting the tourists at that time of the year

I know you can buy train tickets at renfe.com. I believe you then pick them up, using a pin number and your credit card, at the automated kiosks at the ticketing area in the station. I'm sure you will be told online. There is a translator at the home page. Check into trains from Cádiz to Granada. You may have to go through Sevilla again, but I bet it's faster than the bus.