For legal rules and official records, use the organisation responsible for them. These links are useful starting points for new UK drivers.
Driving licence and penalty points
GOV.UK — penalty points for new drivers
Mobile phones and driving
GOV.UK — using a phone, sat nav or other device while driving
Buying and taxing a car
GOV.UK — tell DVLA when a vehicle is bought or sold
MOT history
The Highway Code
For insurance, the policy wording and insurer's answers to your specific questions take priority over general articles on this site.