You can get your tires replace either on your own or through a dealership. It costs more to get it at dealership, but they might do a better job. Tire replacements should be done during summer and winder.
no
possible,check air pressure in all tires so that they are all equall. was rim balanced once tire was replaced. Bent rim?
no
Not 'required' , but certainly a good idea.
http://www.expresstire.com/general_car_tire_faqs.shtmlwill tell you all you need to know. Though if your tires are damaged you should probably get them replaced.
Depends on how worn they are. Minimum recommendation is that both wheels on the same axle(front or rear) are replaced simultaneously anyhow, and not just one of them. Also, put the best tires at the rear.
Yes, they can
Yes, they can
Do all of them need to be replaced? Also depends on if you want them all to match.
if the wear is the same than yes
The tires that have not been replaced will wear out quicker than the new ones - possibly compromising the grip on the road.
Bicycle tires can last in storage for about 5 years before they need to be replaced due to deterioration.