Kmp, note that there's two parts to any template: the template code and the template call. You might copy the following template call from any wiki:
{{Infobox Character
|name = Katrina Middleton
|image = YNdfGFU.jpg
|born = December 28, 1993
|nicknames = Pumpkin by [[Mike]]<br />Princess by [[Lucas]]<br />Half-Pint by [[Matt]]
|marital = In a relationship with [[Lucas Cassidy]]
|titles = [[The Middle Sister]]<br />[[Daughter of the Court]]<br />[[Goddess of War]]
|species = [[Witch]]
|gender = Female
|height = 5 '2''
|hair = Dark brown
|eyes = Hazel
|siblings = [[James Middleton]]<br />[[Melissa Middleton]]<br />[[Emily Middleton]]
|parents = [[Katia Middleton]]<br />[[Alexander Middleton]]
|grandparents = [[Henry Dragone]]<br />Unnamed maternal grandmother<br />Unnamed paternal grandparents
|loyalty = [[The Wiccan Goddesses]]<br />[[Angela and the Court]]
}}
But unless the template code at Template:Infobox Character on the very same wiki exists and supports every parameter you've listed, it's very likely not to work. The template code can vary entirely between wikis (though some templates are included by default and are therefore somewhat universal until edited by the user).
It looks like DEmersonJMFM created useful template code that was compatible with the template call you used, so you can thank him. If you need further help customizing the template code, perhaps check out my blog or feel free to ask for further help.