Website down and can't log in

My website has not been modified for nearly 12 months. When I went there today it was down, i.e. text only with no wordpress theme/style/picture anywhere.

I tried to login, but the login page would not show up. I tried in another way and when it did show up the following error showed up:

404 Not Found
The server can not find the requested page:

202.60.64.73/~rainagai/wp-login.php?redirect_to=http%3A%2F%2Frainagain.com.au%2Fwp-admin%2F&reauth=1 (port 80)
Please forward this error screen to 202.60.64.73’s WebMaster.

Any ideas?

Thanks

Anton