It depends what you mean by the term 'ultralight' ! If you mean a scale model of a helicopter that you fly by remote control - no. If you mean a full-size helicopter you actually sit in to fly - yes.
An ultralight helicopter is a considered to be a toy and it a common collectorÍs item. There is no need for a license to fly or play with this type of helicopter.
This depends on what country your in, In Australia, Yes, you do need a License, in Great Britain, Yes, the Ultralights/Microlights there are listed under their national register and therefore you need a license. In the United States, A true single seat ultralight requires no license to fly (assuming it meets the requirements of Part 103 for an ultralight aircraft). Any two seat "ultralight" or Light Sport type aircraft requires a Sport Pilot Certificate or higher to fly.
You need both medical and license
Yes (see website `National Microlight Association of Ireland' under `FAQ')
No. The aircraft must be accordance to FAA FAR 103
Yes. To fly a helicopter, you require a rotorcraft license in the US.
yes but you have to do a few things to get a pilot license first.
Say your pilot who flies an ultalight. It is illeagle to fly an ultralight in a storm and you need to avoid them while you fly.
No, you need an actual gyro plane license. However, if you already posses a helicopter license, the gyrocopter license is considered an add-on, since they are both in the same category, being rotorcraft. This implies you will not be required to do another written exam. Of course you will need ground instruction, as well as flight time in the gyro before your actual checkride.
Flight training, mostly; you need a commercial helicopter pilot's license. The company you want to fly for will also have requirements that are, usually, higher than the FAA's.
air cadets get to fly at the age of 13
There is no age requirement for ultralights.