You can purchase Peugeot car parts from the spare parts Peugeot store. They offer sales on their website as well, so you can look at what items they have to offer and at what prices.
One can purchase a modified Peugeot 106 from Piston Heads's official website. These cars are mostly sold in the UK; one would need to contact the seller from the website if interested in buying.
You can purchase parts for the Peugeot 20 online from websites like Online Car Parts and Best Part Store. As the Peugeot 20 is a french car you would have the best luck sticking to European companies when trying to locate parts.
Possible ground issue at the taillights.
One possible reason is that the brake linings are worn to the point that they need to be replaced. This is meant to be an early indicator of brake wear.
You can purchase high performance brake kits at several of the racing parts location or you can go to Auto Parts Warehouse and purchase your drum kit from between 70 and 100 dollars. Personally I would go with Aluminum Caliper big brake kits.
It is possible that a wheel speed sensor is bad. This will cause the anti lock braking to not read the wheel correctly which would be a brake problem that would cause a light.
The best place to purchase a cheap Peugeot 306 would be from an auto dealer. Doing a little searching and price comparison will help. Auto Trader usually has a good variety of used cars for not a lot of money.
Possible wrong rotors???
It would be possible to purchase a Panasonic Blue Ray television from Best Buy. Best Buy has retail stores and an online store that televisions can be purchased from.
To purchase and get Alicia Keys concert tickets, it would be reasonable to purchase them online. If online shopping isn't a option, then it is possible to get them at any ticket master near you.
your brake rotors are warped. You should repalce you brake pads and have the rotors resurfaced if possible, or replaced.