Yes, Vivo V5s does have 3.5 mm music jack.
No. Vivo V5s is not waterproof.
Yes, Vivo V5s does have app clone function.
You will get Vivo V5s, Vivo XE100 earphone, User manual, Micro USB to USB Cable, USB Power Adapter, SIM Ejector Pin, Protective Case and Protective Film (applied) as in-the-box accessories.