Yes, it is important to have a starting capital. You will only be paid after your first month of work and it is useful to have enough money to pay the costs you incur abroad in the first month. You have to take into account travel costs, the first rental costs, costs for public transport, furniture and food. It is also good to have some extra money on hand for fun outings and activities with your new colleagues/friends!  However, it depends on your new destination and possibly the relocation package how much starting capital you will need.