A:AnswerYou should have access to all the Office apps. We recommend that you reach out to our Customer Support Team for help here: https://support.microsoft.com/en-us/contactus/.
A:AnswerYou can use Office 365 on both devices. Just a quick tip to install on the second device you will not use the activation code instead you will log into your Microsoft Account on the new device and install Office 365 Personal from there. You can learn more about it here: https://aka.ms/AA4rq32.
A:AnswerYou might lose access to your documents if they are stored on OneDrive, as your access will go from 1TB to 5 GB and anything over 5GB may not be stored in OneDrive. Use at your own risk!
A:AnswerThe difference in price is whether the subscription can be shared or not. Office 365 Personal can only be used by one account, while Office 365 Home can be shared with multiple Microsoft Accounts. Both can be installed on multiple devices.