the brakes need bleeding properly by the sounds of it.........I do believe they are 'vacuum filled' or that could be the clutch?? I'm not sure
pads take 100 miles to bed in normally..........sometimes more depending on manufacturer. You aren't supposed to do any heavy or prolonged braking during that period either.
The SRS light is likely to be the plastic connector block under the seat.........moving the seat on the runners sometimes disturbs this and will need checking to see if it is loose or in need of a clean then cable tying together to make sure it doesn't come loose again.
Jim