If I’m not mistaken you are using the reseller system of DirectI. You can get all the help you need on their help pages www.directi.com .
I’m sure the reference on WHOIS will be to the name you choosed.
I think you don’t need minimum funds as a reseller of a reseller, but you need to process the purchases and pay for them or they will be locked in processing.
I’m not sure about the currency changes, but I think you cannot modify the selection afterwards.
Read the help from the control panel, you’ll get plenty of answers there.