yes, but hasn't been funded yet, but is planned for the late 2020s and early 2030s.

None. There are no planned manned moon landings again until at least 2024, and there will probably be no tourists going to the moon until at least the mid 2030s.

There's no fixed date, only aspirations. The USA hope to have a manned mission around 2037. The ESA (European Space Agency) hope for the 2030s. As such a mission would be very expensive and presents major technical challenges, these dates are understandably vague.

There have been several unmanned spacecraft that have landed on mars (look at http://en.wikipedia.org/wiki/Exploration_of_Mars), but as yet, no manned missions. several space agencies have projected possible manned attempts in the 2030s, (http://en.wikipedia.org/wiki/Manned_mission_to_Mars), but as yet, no formal plans have been decided on.

Hydrogen is the lightest element on Earth, however, it's extremely flammable. The most famous incident that caused Hydrogen to be replaced with Helium was the Hindenberg incident in 1939? when the Hindenberg airship caught on fire by something as little as a spark and incinerated to the ground within 3 minutes, killing all on board. Helium is in great demand and isn't very cheap to produce anymore. It is predicted that helium from natural gas would be depleted sometime in the 2030s. So we will eventually have to start producing Hydrogen from water again if we want to retain lighter-than-air travel.