Hello and welcome to the madhouse.
The clock is simple to reset. Hold the button with the clock on it, between the dials until the clock flashes 12:00. Then use the S/R button beside it to set the hours. Press the clock button again to select minutes and repeat the process. Finally press the clock button a third time to finish the setting.
If you have had a new battery fitted then that is not quite so likely to be the cause of the three lights you have.
If it were one of the wheel sensors you would usually expect to see the tyre pressure light on as well.
So we are looking at either one of the two sensors on the side of the brake master cylinder, or the yaw sensor which is mounted under the seat on the right-hand side (assuming the same layout as the UK).
Looking at your photos, this seems highly unlikely

), but check the carpets aren't wet under the seats as this can cause the yaw sensor to fail.
Potentially it could also be the actual DSC unit playing up, but lets keep fingers crossed for the cheaper options first. :roll:
As already mentioned, before you go any further though, you need to get the codes read.