Depends on the region and the form of the company. e. K. has next to no protections but you can start at lunchtime to do commercial activities, a seperate bank

Depends on the region and the form of the company. e. K. has next to no protections but you can start at lunchtime to do commercial activities, a seperate bank account is not required, an GmbH takes quite long and needs a lot of money prepared for the company, but if it goes broke you are safe.