You don't have to have a box spring.But its good to have one.
Not necessarily. The need for a box spring depends on the type of mattress and bed frame you have. Some mattresses are designed to be used without a box spring, while others require the extra support and height a box spring provides.
There should always be a few slats placed accross the bed frame before putting your box spring on. They are supports to your box spring.
It really depends on the size of your bed. If you have a full or queen size bed a king size or Cal King duvet cover might be able to cover the box spring. I recommend getting a bed skirt which will fully cover the the box spring.
A box springs and mattress will last longer if they are on a bed frame. They can sit directly on the floor if desired however and be just fine and comfortable.
No.
They don't. If you use box spring foundations, you need to use the right size.
i really do not know and i need help ugh
It's good to get a box spring that comes with the mattress which is matched to work perfectly together.
A low profile box spring is a box spring of minimal depth used on platform beds where a regular box spring would cause the bed to sit higher than desired.
Upgrading the main spring can help make an out of the box marker better.
A box spring is meant to elevate and support a mattress on a basic bedframe. If you have a platform bed, you don't need the support, and the added height would be a matter of your preference of aesthetics and ergonomics.
If you need the location of the fuses, my '99 scudo fuses are behind the glove box. You need to press a spring clip at either side of the open glove box and remove it completely.