Hi, contact car-registrations-spain based in Los Alcazares, they speak English and will give you a quote for the total package. With regards to headlights, they can remanufacture most headlights to lhd at a cost of around €90 per headlight.
I brought a 2012 Volvo C70 convertible over before brexit, cost me €1340 all in including headlights, rear light and all taxes. Took the car in at 1000, all done by 1400, new plates arrived about 10 days later.
Good luck,
Paul.