problems since installing Windows 10

1. date and time appear in Afar (a Somalian/Ethiopian etc language) & I can find no means of changing to English (UK), my language elsewhere in Windows 10

2. Windows 10 Mail does not allow me to add an important (to me) email account - only my Apple one and MS ones

3. I cannot find a means of recording Sent emails in Windows 10 - is there a Mail Settings place?

4. Windows 10 Mail has not carried forward my Windows 7 Contacts, so I assume I have to rebuild that by hand. I have all my Contacts in a folder, but can find no means of loading them into Windows 10

5. I tried Repairing Windows Live Mail from my Windows 7 set-up in the hope that the two mailers would merge, but that did not happen. I therefore Uninstalled Windows Live Mail, saving my emails to a folder. However, I can find no way of linking them to Windows 10 Mail.

Windows 10 looks pretty but there seems to be no way of getting "under the hood/bonnet" to get things working. I long for MS DOS!!