I don't understand the question. Do you mean as player options? By default templates are DM tools so not a part of standard character generation. Or do you mean alternate racial abilities, like for instance Adaptable Luck for Halfling? For alternate racial abilities, you can take as many as you like, but they cannot stack, i.e. they can't trade out the same racial ability. Going back to Halfling, if you took Adaptable Luck you couldn't also take Craven as both trade out Halfling Luck.
|The Grand Vizier|
|Tom S 820|
I think he wants to know what templates he can legally add to his character.
In which case, the answer is none. The GM may decide to let you use a template, but what mechanics that involves in terms of level adjustment or CR adjustment is left up to GMs to decide. Templates weren't really meant for players to use.