[MauiGirl]

Well, I "feel" for you it is a huge undertaking, much the same as moving (depending on how much stuff you have). I have a large house, overstuffed closets, etc. and am facing the same chore in the upstairs half soon.

All your smaller movable stuff will have to be put in boxes & moved out to a porch, patio, or kitchen or bathroom that aren't getting carpet. Clear as much of the room as possible including lamps, chairs, tables, etc.. When it comes to heavy items like sofa, beds, dressers, you can get those moving pads (look like small disks) to put under the legs so you can push furniture around easily.
Once you get all the small stuff out, installers charge a fee per room to move furniture, sometimes $25 to $50 per room, but get a quote first.

Removing carpet is easy. Loosen it from the tack strip and start rolling it up. Use a utility knife to cut it into strips about 4' wide to make rolls easier to carry out & secure the end w/duct tape. Same with pad. Wear a mask, and gloves, as handling all that exposes you to the toxic chemicals in the carpet backing, pesticides, etc. as well as the yuck of whatever is absorbed and hidden below. Disposing of it is another dilema; find out where you can take it as not all landfills will accept it. What subfloor is under the carpet & pad, concrete or wood? You might want to use an odor killer like Natures Miracle if there are concentrated urine spots, so it won't attract peeing in the future.

I replaced my main living area carpet with tile last year, and am now looking at getting rid of upstairs carpet and probably putting in wood flooring. A task I'm not looking forward to as I have too much stuff to move.

Good luck.