How long does bleeding last after a vaginal delivery and tubal ligation? also do you start having menstral like cramp a week after all this?

Totally depends: It's believed breastfeeding & massage of the uterus causes accelerated uterine contractions (crampy) & thus faster termination of the PP bleeding. Heavy bleeding should stop before you leave the hospital. If you have a blood dyscrasia, like Factor V Leiden or a hemophilia, you will bleed much longer. If you keep bleeding, develop a fever & bleeding smells bad, get checked for retained placenta.

Postpartum: You can bleed for sometime after delivery that is accompanied by cramps. Are you breast feeding? This may increase the intensity of cramping as your uterus goes back to its normal size. The return to normal menstruation is also dependent on return to normal hormone balance and breast feeding alters this balance.