Exterior shelter Stain and Varnish

Wouldn't use a clear coat, after a good clean and going over with aid of an orbital sander spend a few quid and use Sadolin Classic (range of colour tints available) on the bulk of it and Sadolin Superdec on the screening behind the gate. Use household bleach on the masonry and wash off after 1 hour, the timber is probably a construction grade softwood pine is as best I can tell from the photos. My consultancy fee is 35% of the total cost of the job plus VAT.