If you have money, some expeditions with take you with minimal training, but you will probably not make to the top and if you do you will probably die. You ideally need years of climbing experience that include extreme cold weather and high altitude climbing experience.
At least two weeks.
it takes about 2 months in the best conditions
Edmund Hillary and Tenzig Norgay climbed Mount Everest in 7 weeks in 1953
It takes around 40 days to climb Mount Everest, allowing for the weather and aclimatization.
because it takes 7 weeks to get to the top of the Mt Everest and 3 days to get down.
Dawson Stelfox was 35 when he reached the summit of Mount Everest on the 7th October 1993.
they take little lightweight "stoves"
George Everest, after whom Mount Everest was named, did not reach the summit of the mountain. He was a surveyor and geographer who conducted extensive surveys and mapping of the Himalayas, but he did not attempt to climb Mount Everest.
Mount Everest does not erupt as it is not a volcano.
To reach the summit of Mount Everest can take anywhere between 4 to 8 weeks. You have to allow time for your body to acclimatize to the high altitude, then you must wait for the right weather window to allow you to climb to the summit and back safely.
Mount Everest will always be a hard mountain to climb. But with all the improvements that have been made in not only equipment, but technology and communication for climbers, they can stay safer while on their dangerous climb to reach the summit of Mount Everest. Take a look at the article in the link.
It took a 49 years and still going at it. Hope I could Help :)