Spices
tourism
to export gold or agricultural products to Spain
tomatoes
import: oil, cars export: olive oil, other agricultural products
cheese
The number 1 export of Spain is machinery and equipment.
Spain has a wide variety of things that they export. Some of the major export items of Spain are olive oil, refined petroleum, rubber tires, and pig meat.
In new Spain, the main crop that was grown was maize. Additionally, sugarcane and cotton were both major crops for new Spain.
This list is from the CIA World Fact Book; machinery, motor vehicles; foodstuffs, pharmaceuticals, medicines, other consumer goods.
Canada
Spain is Spain's main country, as it doesn't have it's empire anymore. If you were talking about the Spanish Empire, then the Viceroyality of New Spain.