Yes, wait for marriage. If you are a religious person, it is the moral and traditional thing to do. Some common myths and arguements for staying a virgin until marriage are here: http://www.stanford.edu/group/tlw/dormtalks/socialemotional.html This is obviously very important to you so I would say wait. This is not the answer for everyone however.
No. Can you get pregnant ever time you have sexual intercourse? Yes. Is there something you can do to decrease the risk of getting pregnant everytime you have sexual intercourse? Yes.
There is ALWAYS a chance that you can get pregnant after engaging in intercourse ...
No. The sperm needed to fertilize an egg is already inside of you. Although it helps to lay down for about 1/2 an hour after intercourse when trying to get pregnant, getting up and taking a shower after isn't going to keep you from getting pregnant.
Yes, because it is only there that she can release an egg and if during ovulation she had an intercourse there is a chance of getting pregnant.
No. Sperm is needed to become pregnant and that involves a man. The fact you now have mensuration means that the potential of getting pregnant is there.
There are no laws about getting pregnant. It might be illegal for her to have sexual intercourse, depending on the age of the male, but that has nothing to do with the pregnancy.
No. Lots of semen will still pass through the cervix, so you can still get pregnant.
Still good. The really low chances don't occur until much later - say mid- to late-forties.
If you can manage to have intercourse and ejaculate then you have a chance of getting her pregnant.
You can lie on w/e position you want. If a couple have a hard time getting pregnant it can help if she lies on her back with her hips up after the intercourse for about 30 minutes. But that is if you have a difficult time getting pregnant. Normally this is not needed.
It depends on what you mean by "safe intercourse." In using any method of birth control there is always a potential of getting pregnant. Nothing is 100% effective except for not having sex. So, yes, there is a possibility that you may be pregnant.
Al Gore and Tipper are getting a divorce because he wanted to engage in sexual intercourse with her on national television.