Replace the line part that is causing the restriction.
I wouldn't repair any brake parts unless I am a professional mechanic. Brake boosters can be very difficult to replace and if they are not replaced properly, it can cause a serious accident.
Depends on what the problem is. Unless you are skilled I highly suggest you have it repaired by a pro.
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.
If you are wondering what companies offer nationwide coupons on brake repair because you are on a budget, then the best place to get brake repair would be Tom's Auto Repair.
Cheap brake repair can be found nationwide at a local pepboys store.
You do not repair them you replace them.
The cost will vary greatly according to the type of repair work required. A list of average prices is available at http://www.carsdirect.com/car-repair/average-brake-repair-cost-for-each-brake-problem
A brake repair shop is where you take your car to get your brakes serviced when they are bad. Some of the brake repair shops are Goodyear, Midas, Car X, Firestone, etc.
The cost of brake line repair is anywhere from 50.00 dollars and up. To repair the brake line it depends on who is fixing the car and what type of car you have.
The average cost for brake repair is fifty dollars but then again they are varied around different states so there is no cheap unless you know some deals & find coupons to use.
The brake system has an average repair cost of $350
There are several sources that offer brake repair service by a brake team, you should choose one that offer the least stress on you as they do the repair. Two names come to mind and they are Mienke Brake Repair Service and GMC Brake Service and their work is excellent.