I read that students are 40 min away from the university by foot and 20-35 by public transport. Is it our responsibility to provide ourselves with transport money. Is it better to use single tickets or cards? Are there any discounts for tourists/students?
Yes, this is correct. About 40 minutes walk and around 25 by metro+tram; The best option is to buy a 10 tickets card (http://www.metrovalencia.es/wordpress_en/?page_id=304). It is called BONOMETRO and it is 7.20€ for 1 zone (Valencia city is ZONE A). The card itself is 1 extra euro. If you buy the card in the airport for only 1 trip to downtown (it is 3.90 euros + 1 euro for the card), once the card is empty (you use the single ticket to get the city from the airport) you can recharge the card only for ZONE A and you do not need to buy another card. This can be done always, but the card must be EMPTY.