Ford Falcon Problems

Your first port of call is to the mechanic who did the roadworthy. Show him the report from K-Mart and suggest that he should have observed these issues when he did the roadworthy check and they should have been fixed at that time. If he objects tell him you will report him to Vicroads, and follow through and report him if he refuses to help. If he has breached the law he could have his RWC licence revoked.

There's no reason to believe adding a cooler would increase the performance. I wouldn't bother wasting your money on a test.

The fuel consumption is maybe a little too high, I reckon 11-12 L/  100 km would be closer to what you should get, but a lot depends on the load you carrying, the speeds you drive at, the traffic density etc, which makes it hard to be too specific. As for the engine I reckon you need to have it thoroughly checked over, it doesn't sound healthy to me.

You could contact Ford's customer assistance service and ask for their help, but I suspect the only way is the get the serial number from the DVD unit and give that to them as the dealer has suggested.

Getting 103,000 km out of a set of pads is quite remarkable, and probably due to the car being used in the bush without the stop-start traffic. It's quite normal today to be replacing pads every 50,000 km or so and replacing discs every second pad change. Country cars can be good buys because of the less stressful life they tend to lead. There is no replacement time set down for cat converters, when they go they tend to collapse internally, and when it happened to a car of mine a while back it
blocked the exhaust and brought the car to a halt.

It could be that the brakes are holding on, which was a known fault of the BA. Check the brake master cylinder and the power booster; it's most likely the booster that's causing the problem.

Replacing the crank angle sensor is a good start, that's most likely the problem. The coil could also be dodgy, but I would replace the crank angle sensor first.

It is good practice to run approximately 20 litres of petrol per month to keep the petrol volatile. The reason it's recommended you maintain a quarter of a tank of petrol is to protect the fuel system components such as the petrol pump, which may remain active during operation on LPG.

You should drive according to the conditions. If the going is flat it's ok to leave it in Drive, but pull it back into a lower gear in hilly terrain. If in doubt consult the owner's manual.

It shouldn't happen and the dealer's explanation is nonsense. Check the brake master cylinder and brake booster for leaks.