They work relatively well although it is easier to use just a microwave or just an oven.
I just bought mine today but it doesnt really work. I think it is because of the light bulb so I have to buy a new light bulb. Remember, it's a toy and isn't meant to work as well as a real oven.
a solar oven works by sun
Not so well. It might gather enough heat to warm food a bit, but definitely not 100%.
Ovens work by using heating elements that are usually located on the top and bottom of the inside of the oven. Typically, gas or electricity fuels the elements to heat the contents of the oven. Oven have controls on the outside to set the temperature and turn the elements on.
You turn it on then it cooks what you put in it.
yes
it smells of poo
Yes, in fact an older brick oven will barbaque food better than a newer grill.
If the other parts of the oven work (the light), the problem could be a burned-out oven burner, or possibly its fuse inside behind the oven. If the other parts of the oven don't work, the plug could be unplugged or the breaker or fuse in the fuse box (breaker panel) could be blown.
An oven bag is made to do the same thing a roasting pan does by retaining the juices in the roast. A slow cooker does the same thing in a slightly different way. Both ways work equally well.
Any paint used with a paint base will work well to cover the existing paint.
You can bake them right away. If the batter sits too long the leavening will not work as well in the oven.