Believe it or not, the easiest way to get ink off of furniture is a baby wipe! I don't know what is in there but something in the baby wipe will lift the stain, it works if you spill something on a carpet too!
Surprisingly the best and easiest way is to use a pink or white eraser. If this method doesn't work, rubbing alcohol on a microfiber cloth works great.
The best way to get ballpoint pen ink off of leather is to clean it with soapy water and rinse it well with water later on. It is possible that the stain will not be able to be removed.