Ermmm i think all you have to do to keep it running is..
make sure your computer is on and you have your sever checking in the no ip, so that the emotion is a smiley face
And to make your character (player).. you just log into your server and and then it should be in your client.java notepad.. and im pretty sure you can give your character infinate gold because its your server and you can do whatever you like, i think you just have to code it to your character..
I am in the process of making my own server also.. it is very hard to do if you have no idea about computers and start from scratch.. but im nearly done i think, and if your starting one and you need help through all the steps.. if i can assist you i sure will, just add my windows live messenger...