The Walther PP was made in 5 different calibers- ONE of which was .32 Auto. If the gun is question is a .32, it can shoot .32 auto. If another caliber- no.
.32 caliber
The Walther PP uses a variety of ammo, depending on what model you own. The most common type of round used overall is the 7.65mm round and the majority of Walther PPs and PPKs were designed around this round. There is also the 9mm Kurz round that could be used in these guns also. It was only after WWII was over that the Walther PP and PPK were redesigned to shoot a .22LR round, but production lines were shut down soon after because the .22LR was not a common round at the time, so few were made in relation to the standard 7.65mm. The least common type of round used by Walther PP series was the 6.35mm round, which the PP and PPK were both originally designed to use early in the war.
.32 caliber is not enough infromation. Ammunition marked "7.65 Browning", ".32 auto" and ".32 ACP" for practical purposes, are all the same. Do NOT try to use ammo such as ".32 magnum" or ".32 long" as it would be a different round.
50-500 usd
Someone at p38forum.com might be able to help.
You will need to contact Walther
You will need to contact Walther.
You will have to contact Walther to find out.
No such sn used by Walther.
Depending on EXACTLY what you have, a few hundred to multiple thousands of USD.
The PPK/s is a PP with a PPK slide.
Impossible to answer without the serial number.