Thanks guys!
The work required is a service, all new safety equipment, new seats as they're torn and wrecked, new cushions for the cabin as they're ruined, new carpet and new batteries. The electrical doesn't concern me too much as my best mate is an electrician and can do it all for free for me but I still want it checked though to make sure there's nothing major. It's really just dirty as it's sat in the weather for over a year but I don't mind giving it a good clean.