Hello and welcome to the site.
Thank you for requesting I answer your question.
As far as paying for the van and refurbishment of shop, both would be treated as capital introduced into the business.
Your entries in the accounts would be
Debit - Fixed Assets - van
Debit - Fixed assets - Refurbishment costs
Credit - Capital introduced
and you would claim capital allowance for the expenditure.
You say you use your car for some business use - if you have not claimed for it before, you may wish to claim fixed rate mileage allowance for business miles travelled. First 10,000 miles at 45p/mile and 25p/mile for over 10,000 miles.
I hope this is helpful and answers your question.
If you have any other questions, please ask me before you rate my service – I’ll be happy to respond.