soem questions about apache

jiemin_lv

enviroment:
linux9+apache/2.0.40
question:
1
i have put index.html page in the DocumentRoot directory and i can browse the page by inputing the address in the explorer,but it can NOT show the right character code.i have to choose the gb2312(简体中文)in the explorer manually.i have read some document that saying:change the "AddDefaultCharset GB2312" in the httpd.conf file,i tried,but it does not work. i want to know How can i the explorer show the right character automatically.
2
i have changed the setting in httpd.conf file,i deleted the "UserDir disable" and uncomment the line "UserDir public_html" ,then i added a user "jimi" in the system and built the public_html directory in the /home/jimi/ and added index.html in the public_html dirctory ,but i can NOT browse the jimi's page by inputing the url http://serverip/~jimi ,it displayed as below :
"Forbidden
You don't have permission to access /~jimi on this server.

Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request."
How can i correct this problem ?
3
i have open the service vsftpd and telnet in the system,but i can not ftp and telnet the server using the root .what the problem it is?
                              thank u for helping me