Capacity is definitely 5 and maybe 6 due to that extra long magazine.
The ammo should be round nosed unless you use the Hornady LEVERevolution with the soft rubber pointed tips. Chain fire in the tube mag. is a definite possibility with pointed bullets.
As far as I can tell from the photo, seems to be in good shape and $339 isn't a bad deal. Actually a good deal depending on the region.
Depends on where you live and if it's legal for large game, the 35 Rem. is an excellent and often overlooked cartridge. Within range, it will put a whoop'n on Deer, Blk. Bear, Wild Boar and even Elk. Many a large game have fallen due to the thump of that 200 gr.,/ 35 caliber.
You done good - enjoy.