Basically, it is not necessary when applying. Payment will be required between the time you receive the contract and by the time you move in.

Please be assured that information and tours are free.

The security deposit is a deposit and will be refunded upon moving out. However, if your room is damaged/excessively dirty a restoration/repair fee may be paid from the security deposit. Key money is money given to the landlord for letting you use their room. Unlike a deposit, there is no refund when moving out. Recently, rental properties without key money are increasing.

No security deposit does not mean that it costs extra when moving out. However, if there is no security deposit, the tenant will have to pay for the cleaning/repair costs (at the cost of the tenant).

Yes, it is free. You will not be charged for making inquiries.