WRONG. First, you need to know what type of brakes you have. I'll bet you've got canitlever brakes. If that's correct, new brake levers set up for V-brakes won't work. Setting up a 7 speed to work with a six speed freewheel takes someone who knows what they are doing and probably won't shift smoothly through all the gears. I mix and match 8 speed shifters to 7 speed because the spacing is almost identical, but 7 speed adapted to 6 speed I've not tried. I'd try to get a six speed shifter and brake assembly. Maybe on ebay you can find some used parts or maybe you can find a donor bike as has been said.