I came across the following sentence.
Then he sold his piano and let the mice live in a bureau drawer. But money he got for that too began to go, so he sold the brown suit he wore on Sundays and went on becoming poorer and poorer.
This is from a novel "The Story Of Doctor Dolittle". I am taught that after "too" is adjective like the car is too fast to drive. However "began" is a past tense of "begin", isn't it? What's the meaning of "too began to go"?