Personal safety equipment is essential, and I would not recommend you start your chainsaw without the correct safety equipment. A Hardhat with earmuffs and visor are pretty much standard equipment when buying a new saw. Some people prefer safety goggles as opposed to the visor, but that is a personal preference.  Gloves and boots will protect you from scratches, and more and shinpads are a good addition. Chainsaws are dangerous by themselves, and when coupled with falling trees, the situation demands careful attention. Be cautious and attentive.