@newsy
The latest version of Safari is 11.0.2. Assuming your Operating System can accommodate the latest version, click on the App Store, then choose Updates.
Even with your current version, the way to Empty Caches is the same.
Firstly, in Safari, go to Preferences (shortcut is Command + comma. Or click on Safari and choose Preferences from dropdown menu).
Click on "Advanced". At the bottom, if not already checked, check the box "Show Develop menu in menu bar".
Now you will see "Develop" in the top Menu Bar of Safari between "Bookmarks" and "Window". (It might have been there already, but probably not)
Click on "Develop". From the drop down, choose "Empty Caches". That's it.
As regards your Home Page. Open Safari Preferences, click on General.
This will appear:
Where it shows Homepage (Yellow arrow), click on it it and delete what's there, i.e., leaving it blank. (Or, if you prefer, type in the URL of whatever you want.)
Then Quit Safari. Then reopen Safari.
Merry Christmas.
Ian