Short answers, pulled from the story.
Early Muslim historians recorded the city as Luhawar, Lūhār, and Rahwar. One theory suggests the name is a corruption of Ravāwar derived from Iravatyāwar linked to the Ravi River known as Iravati in the Vedas. Another legend claims the name comes from Lavpur or Lavapuri meaning City of Lava son of Sita and Rama.
Sultan Mahmud conquered Lahore between 1020 and 1027 making it part of the Ghaznavid Empire. He appointed Malik Ayaz as its governor in 1021. During the reign of Sultan Ibrahim Malik Ayaz rebuilt and repopulated the city after it had been devastated.
Ranjit Singh established a Gurdwara Ram Das to mark the site where Guru Ram Das was born in 1534. The establishment occurred during his rule over the city following negotiations with the Afghans for the post of subahdar to control Lahore after the second invasion in 1798.
Lahore was awarded to Pakistan based on its Muslim majority in the 1941 census. On the 17th of August 1947 the Radcliffe Line had not yet been announced but the decision relied on the demographic data showing 64.5% Muslim population from that year.
Commercial operations began on the 25th of October 2020 after successful initial test trials in mid-2018. The line consists of 26 subway stations and is designed to carry over 250,000 passengers daily.