A:AnswerYes, batteries are required for the wireless keyboard and mouse. Yes, they are included with your purchase and are already installed. You just have to pull out the white "tape" to activate the batteries.
A:AnswerIt is a fairly simple task depending on how many files you have to transfer. Here is a link to a guide Microsoft made for transfer from a Mac to a PC:
https://support.microsoft.com/en-us/kb/2636421
I hope this helps.
A:AnswerBecause my old computer did not have working USB ports, due to a storm & a power surge, Best Buy was able to move all my information onto the new computer including Windows 7.