Dichos

Question 1

Dime a dozen

Answer 1

cars like that are a dime a dozen

Question 2

You are jumping the gun here

Answer 2

Start doing something too soon, act too hastily. The local weather bureau jumped the gun on predicting a storm; it didn’t happen for another two days. This expression alludes to starting a race before the starter’s gun has gone off, and supplants the earlier beat the pistol, which dates from

Question 3

The sting in the tail

Answer 3

an unexpected, typically unpleasant or problematic end to something.
“the Budget comes with a sting in the tail—future tax increases”