The word contour in this context means the slope, or the change in elevation, of the road. Yes, it's the same meaning as contours on a map.

"Nursing home" is correct. "Old people's home" is commonly used, but can be seen as insensitive to the residents!

Yeah, it's always a crush when talking about a person or group of people. However, if you are talking about an amount of something, or an inanimate object, it's slang for "I want". crush: "I fancy Radiohead", "I fancy Carly Rae Jepsen" non-crush: "I fancy a cake", "I fancy listening to some Radiohead", "Fancy a coffee?", "Fancy some pizza?" For some fun slang for liking a band, you could say something like: "I dig Radiohead" (though maybe a bit outdated), "I'm into Radiohead"