Can i give this to my cat? plz hlp?

First, you shouldn't have any of the Amoxi left. always give all the medicine or you could have a relapse of the infection. Second, the medicine is old and no longer any good. Just throw it out. It's very inexpensive to get antibiotics at the vet so ask if they will accept payments or hold a check or something. Your kitten needs immediate vet care. If you can't give it to her, please turn her over to a shelter where she can get help.