Every time you make a entry in a post, your "ranking" goes up. Like form jr., to sr. Stuff like that. Although you can't just rank it up by doing games, actually helping people is how to do it. And as for the floof o meter, it goes up when certain people find whatever you posted helpful or amusing. Other users go to ur little box, and above the online box, there is a link or button that says "nuzzle".
Markings could be found all in the Mods section as pointed out above. There are tons there, and sometimes in the Feral Heart section, there are Mods, masking, and items there you can try out