What's this hat all about? Sorta looks like bull horns?
Exactly! Those are two horns with a sun disk between them! You're looking at a statue of the goddess Isis, commonly shown with this headdress, along with the child Horus. The kind of cows native to Egypt also have horns like this.
When she isn't wearing this sun disk with horns, Isis is shown crowned with the throne hieroglyph, a method of writing her name.
What is the thing protruding from their foreheads?
That thing on their foreheads is known as a uraeus, a term which refers to the cobra included in ancient Egyptians royal headdresses. This cobra was a protective symbol worn by royalty and associated with the Egyptian goddess Wadjet. She used her fearsome powers as a cobra to defend the nation.
Awesome! Thank you.