Yes. SKU 181579 is an outside radius base corner for this baseboard.
There is no straight forward answer to your question. It depends on the room dimensions and the length the baseboards you buy. Typically, these are sold in 12 ft lengths, but I have also seen 8 and 16 ft lengths. You normally want to avoid more junctions along a wall than necessary. If you purchase 12 ft lengths and your wall is 17 ft, then you'll need 2 pieces, but how long each piece will need to be will depend on where your wall studs are. This is because you will need to have a nail go through the joint and into a stud to make the joint secure. If not, your joint will stand out and will be very unattractive. It is a bit of a puzzle you'll need fo work out on paper. Look for videos online if you don't know how to properly attach baseboards to a wall. A. It's much to explain here.
I used an air nail gun with 1and 1/4 finishing nails. if you have a larger nail gun I would recommend a longer nail.
I would think so, yes.
I pay other credit card.
no, they are square corners. 90 degrees.
My handyman helped me get it into my truck so no cutting needed. However, if we needed to cut, there is a cutting board available and my handyman can do it himself which he has done for other items we purchased.
It comes in two lengths in the store but you can buy it by the foot. So unless you are buying pre bundled, you can get the length you want by simply cuting a long board to your desired length.