Questions about NortonLifeLock security deluxe

I only receive the licence key for this version and can then use it to extend my existing Norton product.

Just after a year, I get the message that I should renew the subscription in order to continue to be protected. I bought the version for 24 months. What do I have to do now?

Unfortunately, the download/ESD version of Symantec Norton Security Deluxe 3.0 for CHF 47 does not indicate whether it is for 3 or 5 licences: Could you clarify this?