First of all, this is in the wrong section.
Second of all, reputation can be increased when a member with higher rep power clicks on the star on the bottom left of your post. After clicking "I Approve", your rep will go up depending on how much rep power the person who rep'd you has.
Third of all, badges and ribbons are free. Just get the [IMG] url and paste on signature according to your current usertitles. Usertitles and name-changes require a post restriction, unless you are a staff or donator.
Lastly, member level 2 is obtained by having 2,500 posts. Along with mem lv 2, you receive the member level 2 usertitle, an avatar size dimension increase, and underlined username.