Does the left stick hold in the fully down position? If not , then the previous owner may have removed the mechanical locking tab and you are powering up with the left stick fully down. As soon as it moves from this position the beeping will stop.
The comparison with the printer and the computer is not the best one........there are loads of printers that will print straight from a memory card.....:)
You are making the common mistake of thinking that wi-fi and internet are the same thing, they are not.....
Wi-Fi is simply a communication method and is used by the P3S for video and telemetry comms
:)
Yes, Telnet is not enabled as standard. you can use the Magic Power mod to enable it. :)
If you are competent with the 'UNIX' operating system then there are other ways of enabling it.