In order to book an Education ad in Times of India, you need to visit the Times of India Education Ad Rates page. There you will see a list of cities mentioned alongside their respective rates for booking education advertisements. You will also find special discount packages that offer to publish you ad in multiple Times supplements all over your chosen city.
The best bet to get your ad published in TOI Lucknow, while covering Varanasi as well, is to opt for the TOI Lucknow discount offer. The offer covers both Kanpur and Varanasi but not Allahabad. There is no immediate process to book an education ad in Allahabad. Since this location is covered by the Lucknow editions. So if you are booking your ad in the Lucknow edition, then the same will be published in across Allahabad as well. Please ensure that the booking of your ad is confirmed at least 2-3 days in advance.