That is a Currie Scoot-E electric scooter. We carry parts for it on this page: https://electricscooterparts.com/curriescooteelectricscooterparts.html
Please let us know if there is anything else that we may help you with.
From looking at the photos we can see that the following parts are missing:
1. Footplate and rear fender. (no longer available however could be remade from plywood)
2. Battery pack with a fabric case and battery harness. Item # BAT-2410PK
3. Thumb throttle. Item # THR-AWI5K
4. Battery charger. Item # CHR-24V1.6AXLR
All of these parts except for the footplate and rear fender are available on our Currie Scoot-E Electric Scooter Parts page.
Please let us know if you have any questions.
We do not have a warehouse in Europe. We carry a battery pack wiring harness which you could import along with the throttle and that would help to keep the weight and cost of shipping down. Then you could purchase the batteries locally.