Get-EventLog need help with date and time property.

Hi,

I want to know the list of date and times when my pc was last started. I used below command:

Get-EventLog -LogName system -Source Microsoft-Windows-Power-Troubleshooter -Newest 10

This shows the list of first 10 details when my pc was booted up, but when i use select-object with time property in the above command, it shows empty output, whereas index or source etc properties has data in it. I have the following questions.

1. I need time(it also has date) and source properties. Time property is shown as empty. Also, if I use fl * , there are two time values, TimeGenerated and TimeWritten. what value it is taking in and converting in calculating time property. How can I acheive this?
2. The time property shows in 24 hour format. I also want to convert to 12 hour format. 
3. Even though I select only message property and use ft -autosize, some of the message part is not shown. I also want to see the full message.

Thanks,
Chaitanya.