Here built is the past participle of the irregular verb build. Follow the link to find out more and to listen to examples.
more information: build
You've got to be kidding
The expression you must be kidding or you have got to be kidding is used if something surprises you a lot.
Example: He's in his eighties and still surfing? You must be kidding
Took is the past tense of the irregular verb take. Follow the link to listen to some examples.
more information: take
spins a few yarns
To spin a yarn is to tell a story.
Example: He spun a yarn about working late when he was really with his lover.