A:AnswerTypically, it means you can link it as an extra device on your phone plan. Instead of needing a Wifi hotspot, it will use your cellular network.
A:Answeryes, you must use USB type C devices, or use a USB type C dongle that has the connections you need (like USB type A, the square one). Or you can get mice and keyboards that support Bluetooth connections, this would be much less hassle.
A:AnswerYou can buy Microsoft Office, which includes Word, Excel, PowerPoint and One Note, for a one time fee of between $120 and $150 depending on if it on sale. Never buy a MS Office subscription if you plan on keeping your computing device for more than 2 year.