It could be a few things. it could be your alignment is off or you might have a bad bushing on one of your control arms. I hope this will help.
yes
take a look at your front rotors if the are not smooth then they need to be changed also check if they are warped that will be a little tricky if you dont know how. best bet is if you havent changed brakes in a while you should go ahead and do it. as far as the turning have your wheel bearings looked at and your tires if the bearing have failed they will cause a squeak or grind and if your tires are too big or out of round that will cause a vibration
Most common cause is warped rotors.
new tires. If the tires brake, you'll need it
Not likely but it will wear the tires out.
you can go to grismer automotive service. They will check the tires and brakes and let you know the issues and tell you if the brakes and tires need to be replaced or serviced.
The cost of brakes is at least $200.00. It does however depend where you go to get your breaks changed. Evans tires is a very good place though. Greater question, and I hope this answer helps.
Yes, that is the purpose of brakes.
Tires are changed during an auto race because the tires get worn down by the track. It is safer to have good tires than to have tires that are worn down that could blow apart and cause accidents.
are the tires the same size and did you take this to a shop they could of adjusted your brakes when the wheel were off i know at my shop when we tend to do tires f the rear brakes need to be adjusted we will do them in the tire package if this is the case after a good run in the car with a bit of braking it should go back to about the same as it was once pad make there new grooves
The rear tires except Subaru which does the front.
I prefer to remove the tires to properly inspect my brakes whether for disc brakes or for drum brakes. It is not necessary though and you'll likely find most repair shops will do a brake inspection with the tires on unless they want to be able to show you the wear and remaining brake linings.