Beijing has an extensive public transportation system that includes buses, subways and taxis, and it's relatively cheap compared to other major cities. The subway is the most convenient and affordable way to get around, and the price varies based on the distance traveled. Taxis are plentiful, but it's important to make sure the meter is running to avoid overcharging. Hiring a private car or driver is also an option, but it can be more expensive. Travel costs can range from ¥2-¥20 for the subway and ¥20-¥50 for the taxi.
If you have more time, you can consider visiting other attractions like the Ming Tombs or the Temple of Confucius. If you have less time, you may need to skip some of the attractions, prioritize your must-see sites, or explore them at a faster pace. It's also important to wear comfortable shoes, dress appropriately for the weather and bring plenty of water, as there can be a lot of walking involved.