You could try a translator like at http://www.altavista.com/babelfish "I cannot take any more" gives: No puedo tomar más
'take in' is rather ambiguous. Please specify more clearly.
Chica, no puedo vivir mas sin tu.
No puedes estar aqui
No puedo decirte eso
to say take in spanish i is tome pronnounced tom-ay
jenn in spanish is jenn in most latin bassed languages names given other latin bassed language is the same but to make it sound more authentic I would suggest saying it in a spanish accent if you cant just say it as you would say in English
no se le puede creer
No puedo esperar a amarte
he is not real so u cant say hes funny
Según sea necesario is the best way to say "take as you need" in Spanish.
"I don't take ..." is "no tomo ..." in spanish.
No puedo vivir sin ti