I can't tell from the pics what the dates or denominations are, but, you're first coin is from the republic of Taiwan, the second as has already been said is a Chinese cash coin, and the third coin is from Ethiopia. Hope this helps!
The second one is a Qian Long Tong Bao cash coin. It looks to have made at the Board of Revenue mint. This emperor reigned from the mid-1600's to the early 1700's. However, it is incredibly common and is worth almost nothing.
These were the last of a pile of unidentified coins a co worker got from his father. He did have some really cool silver Japanese coins. That I got to identify.
He gave me like 12$ in junk silver for helping sort and label the coins.