You might have a period of culture shock adjusting to living in Seville, as the Spaniards tend to champion an all around more relaxed lifestyle than in many Western countries. Shops will close up late in the afternoon for siesta, meals do not begin until much later and can loll on for hours, and nightlife tends to start very late at night and end very early in the morning. It can be a fun and rewarding experience immersing yourself into this lifestyle as you teach English in Seville, so be patient and feel out the pulse of the city as you adjust.
Public transportation is quick and easy around Seville. There is a good bus system, a metro, and the Sevici community bicycle program, which offers a cheap and easily accessible system of bike sharing. Exploring Seville by any of these means is an extraordinary experience, as there is so much beautiful architecture to see and so many cultural treasures to be discovered. The Plaza de Espana, Giralda, and Alcazar Palace complex are a few good places to start. Further, if you teach English in Seville you will soon be moving past the tourist attractions and finding your own special niche living among locals!
It will greatly benefit you both in and outside the classroom to be at least conversational in Spanish before obtaining a teaching job in Seville. Though most English teaching jobs in Seville will want you to minimize your use of Spanish in the classroom, so that pupils can learn English more efficiently. In general, you will find that overall communication is much easier if you are willing and able to speak Spanish in most informal scenarios. Some teaching jobs in Seville will even include Spanish lessons for those who want to expand their language skills.