A slanted tire is a serious safety hazard. It can mean the tread is separated or the wheel housing is cracked. Either can cause a potential accident. It is best to either change the tire, or get it checked.
the axles or suspension.
Buy a new tire.
That cannot be done. If broken, the tire is useless.
One of the simplest ways to fix a slanted door is to put some shims on the appropriate hinge or hinges and see if that will help add some weight in the correct place. Alternatively one could follow the instructions on eHow.
No, rotating the tires will not fix feathering. Tire feathering is an issue that must be fix, other wise you will keep on buy tires every 2 months ( if brand new), if use tire with in a week or so depending on the condition of the use tire. I learned this from personal experience.
Put an inner tube in the tire.
yes but you have to have a kit or at least a tire patch
Fix-a-Flat kits work on a very temporary basis. A punctured tire should be replaced.
yes
Yes.
you don't. you replace it.
Buy a tire pluging kit read the instructions and follow them