The station has an Internet café (0.50TL for 30 minutes), left-luggage storage, restaurants, grocery shops, hairdresser, etc. To go to the train station, take bus #140 until the very center of the city (citadel), then take Atatürk boulevard towards North until the train station (about 1km).
Café serving usual tea and Turkish coffee, and many pastries. Free Wi-Fi, power supply for computers/smartphones, and perfectly clean toilets. Friendly staff (though non English-speaking).
Taxi to the bus station takes 20 minutes, 27 YTL. Taxi for Cappadocia 120 YTL. There is a good board outside the airport listing taxi prices to various destinations.
Kayseri is an old and large city with a strong economy. It carries lots of monuments from the days of Seljuks and Ottomans, and is also the home town of the most accomplished architect Mimar Sinan. Population has been steadily increasing and nowadays is around 950,000 in the urban center.
Kayseri was also on the Silk Route and Karatay and Sultanhanı posts on this route reside in Bünyan town's borders. Bünyan is also famous for its carpets which makes Kayseri a popular purchase-stop for tourists visiting Cappadocia.