The warrant appears to have been executed by a high court enforcement agent, you have 14 days to appeal as the money is held before being released to the claimant. When you sold the car you should have immediately posted off change of ownership to the DVLA, and when you moved address updated your license details.
On the issue of declaring this in section 3.2 of the application form, simple answer is no. PCNs are a civil matter, if you had a ticket issued by the police (criminal matter) it would have to be declared.
Please check the status of your CCJ, this would need to be declared on your form as a civil judgement against you.
https://www.gov.uk/county-court-judgmen ... dit-rating
My comments do not constitute immigration advice, if in doubt consult an immigration adviser/solicitor