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Assuming you mean "replace" the brakes, the brakes should be inspected for condition every time the vehicle is serviced and repairs, if any needed, should be done at that time.
If you have to pump your brakes this is serious. Check the fluid level and if it is low, add fuild to the full mark. If this does not help, you need to repair you brakes immediately. You may need pads, or you may have other problems. Inspect them ASAP.
Wheel shaking under braking can be caused by a warped rotor. A grinding noise when you turn can be a bad wheel bearing or worn brake pads. Either way you need to have your brakes and wheel bearings inspected immediately. This can be very dangerous. Any decent mechanic can find the problem and repair it.
If the brake fluid level is low you really need to have the brakes inspected for your own safety.
Check the brake fluid level, it is probably low. If so, this is an indication that your brakes are in need of replacement.
Have them inspected by a competent mechanic, he or she will advise you. However it is reasonable to assume that after such a time the brake pads will need replacing.
There is a reason why it is on. Check the fluid level, it may be low. This would be an indication that you need to have the brakes checked soon.
I would suspect you have a caliber sticking due to moisture in the brake system. Have your brake fluid flushed and fresh fluid installed. You also need to have the calibers inspected.
For your protection, yes, it should be inspected
This is a sign that you need to have the brakes inspected, soon. Worn brakes causes the brake fluid reservoir level to drop causing the brake and abs lights to come on.
No
You have to get the building inspected and they will need to see a license to approve the building. You could just not have it inspected but you could get into trouble for that.