Expert Advice Needed Please.....

Hi people, I kind of need help. I’m temporarily living in a caravan during lockdown until I’m able to find a suitable rental property. It’s a four berth but I don’t know what make/age etc. I’m at the back of my parents hooked up to the mains & all 240v sockets work. However, the fridge (which is electric or gas), the stove / oven & heater (also electric or gas) don’t work. As I don’t know the age or history (it was a panic purchase or I’d have been homeless) I’m not happy about using propane without knowing it’s safe. So any advice on how I can find out the make/age & think about getting it checked or replacing defective stuff would be really appreciated. I’m so grateful to my parents but I feel bad that I’m in their face because I can’t cook or wash up or shower without having to use their stuff!! Really need my independence back for all our sakes...