Have donors already got their hands on Carrots/Potatoes

Oh yes, the new farm items are becoming more and more common by the hour. ( at first though it was funny. You could sell one potatoe for like 40 dollars. And to answer your other question the minecraft wiki holds your answer

 

Mhm, we all have auto farms for them, and to make a golden carrot, surround it in golden nuggets

 

It's wheat with a new texture.

Nothing exciting really.

 

Not as many growth stages, though. Wheat has 8. Carrots and potatoes have 4.