Just goto http://x10premium.com and register a new account and open a support ticket (mention your free hosting cpanel username )then the staff will move the account from free server to premium server.
Yes, There are many users running wordpress on x10 servers.
You have to upload the wordpress properly. I think there are many files missing.
Try to upload again.
Check this how to use your own domain
http://x10hosting.com/wiki/How_to_Use_Your_Own_Domain
Read this too http://x10hosting.com/wiki/What_is_the_Difference_Between_a_Parked_and_Addon_Domain
The default webpage is index.html
So no need of any settings
When I access your domain I see
I think that is there in the index.html
So Flush dns , Clear browser cache and try again.
You got them while registering
If you don't remember then login to Account panel using your forum credentials -- > https://x10hosting.com/control
To change cpanel password then read --> http://x10hosting.com/wiki/How_to_Change_Your_cPanel_Password
I unsuspended your account.
high resource usage means your script(s) are using more CPU or memory for long time
The limits are
25% CPU utilization
5% of memory
240 seconds of CPU time per hour
20 concurrent processes executing