So I got the new Kindle Signature Edition, but I'm having trouble with 3 settings. I'm pretty tech challenged so please be patient!

Because I've purchased books from various sources, I don't have my Kindle connected to the app/wi-fi etc. I did initially set up from the store just for ease of updating firmware, but then de-registered my device because I side-load using Calibre only [manually on my PC]. I know there's better ways, but it's what I'm used to. LOL
1] Every time I go from the book I'm reading back to my library I get the pop-up message 'cloud not available'. Is there a way to make this go away?
2] Each new book I open, it doesn't save my preferred font, boldness etc. Is there a setting I've not seen that will do this for me across all my books on the device?
3] Page numbering doesn't work.

, when I click on the option, it's greyed out [tried 5 random books, works on my old Kindle but not this one]
These are probably user-error, but like I said, I'm tech challenged so any patient help is appreciated.

ETA 3rd problem