What are the chances of getting pregnant on a continuous birth control pill vs. Regular birth control where you have a period at end of month?

Same. The contraceptive efficacy is the same. The purpose of extended (continuous) pills is to treat menstrual disorders, such as heavy periods or painful periods. Hope this helps!
Should be none. You really should not be able to get pregnant. Normally you will not make an egg on the pills and the uterine lining will be thin so 99% chance you will not get pregnant.