Mongolian money is called "Tugrik".
No, Mongolian beef is not really Mongolian. It may be called that to make it sound more exotic and appealing.
The Mongolian nomads live in tent-like structures called Gers
The Huns rode what is now called the 'Mongolian pony' (not to be confused with the Mongolian horse, also called the Taki, or Przewalski's horse.) The Mongolian pony is small, sturdy, comes in many colors, and has great endurance.
Yes, they are sometimes called ger.
KEFIR
it's called the Gobi desert.
Mongolian wool is spun from fleece-bearing animals that live in the geography loosely called Mongolia. Mostly, the fleece is grown on sheep.
"Siberia" comes from the Mongolian word "sibir", which means "sleeping land."
Mongolian hats are commonly known as "deel" hats or "malgai." The traditional malgai is often made from felt or leather and features a distinctive high crown and wide brim, reflecting the nomadic lifestyle of the Mongolian people. These hats serve both practical purposes, such as protection from the elements, and cultural significance in Mongolian heritage.
One can find Mongolian music by finding a Mongolian music channel on Youtube. One can also consider finding a Mongolian friend and asking about Mongolian music.
A coin collection is called, well, a coin collection. The hobby of collecting coins is called numismatics.