Hallo liebe Grüße aus Münster, Ja man kann die Karte direkt am Eingang kaufen. Geht problemlos. Viel Spaß in Peking.

No, da fuori non vedi nulla. Una volta li ti conviene entrare almeno nella zona Anteriore. 10 minuti possono bastare per alcune foto.

Many. all along the road across the main entrance

Yes, you could visit without one. But, I think going with a guide would be beneficial. That is what we did.

Lama Temple is very near to subway. so reaching there is fairly easy

Hola! La verdad es que el templo está siempre muy tranquilo, con la mayoría de los monjes ocupados en mantener las salas en orden... Durante nuestra visita (un lunes), en dos salas se reunieron dos grupos de monjes a rezar y cantar a eso de la una de la tarde, pero no te puedo confirmar si es habitual o no... Espero que te pueda servir de algo esta respuesta.

No it closes at 4:00 or 4:30 PM. You will just see the entrance gate .

Depending on the time of day and the weather, you have to really be careful about traffic getting to the airport! One trip by taxi took us 50 min (from close to the Forbidden City), and another took almost 2 hours (from same location)! We nearly missed our flight. It was uncomfortably tight. So depending on your flight and your personality, you could probably be at the Lama Temple when it opens at 9 and still make your flight at midday, although it might not be the serene experience it could otherwise be. (And then, you need to consider the time it takes to find a taxi!)

It is difficult to manage it but here it is: 1. Beijing Capital International Airport TO Dongzhimen (AirportLine) CNY 25 2. Dongzhimen TO Yonghegong Lama Temple (Line 2) CNY 40 (CNY 20 Deposit for the metro card + CNY 20 minimum charge) Time aprox. 1,5 hour 3. Lama temple CNY 25 Time aprox. 1 hour 4. Yonghegong Lama Temple TO Dongzhimen (Line 2) 5. Dongzhimen TO Beijing Capital International Airport (AirportLine) CNY 25 Time aprox. 1,5 hour You need 4 hours (if you are fast), 5 hours normally and CNY 115, but you have to check-in in the airport after. When we were in this airport we saw the longest queue in our life! The taxi is not better. Maybe you need more time to go to the temple (it depends to the traffic) and you need aprox. CNY 250 to go, wait and return.