no you can not
you must restore your credit.
Pay cash.
It's horrible. You'll never be able to buy anything.
No, you do not get tax money (or a tax credit) when you buy your first house. As of July 2013, the tax credit for buying your first house is no longer in affect.
It is possible to buy a cellular phone if you have a bad credit rating. If you purchase a pay as you go phone, there will be no checks on you what soever.
Have a clean credit record.
If you are credit-qualified.
mortgages
yes
If you have a good credit rating, then lenders (such as banks) will be more willing to lend you money. It is possible that at some time you will wish to borrow money, for example, to buy a house.
Yes.
Yes, mortgages are always there when you buy a house, despite your bad credit, you may not even be offered to buy a house. So you should try to fix it.