What is the likelyhood of Humanity ever realisticly leaving the solar system?
The likelihood of humanity leaving the solar system in the future is difficult to estimate, as it depends on a number of factors, including technological advancements and the availability of resources. Currently, we have only sent a few spacecraft beyond the boundaries of our solar system, and it would require significant advancements in propulsion technology to send a crewed spacecraft on a journey beyond the solar system.

There are several proposed technologies that could potentially make interstellar travel feasible in the future, including nuclear propulsion, fusion propulsion, and antimatter propulsion. However, these technologies are still largely theoretical and would require significant resources and investment to develop.

In addition to the technological challenges, there are also significant biological and psychological challenges associated with long-duration spaceflight, such as the effects of cosmic radiation and isolation on human health and well-being.

Therefore, while it is possible that humanity could one day leave the solar system, it is difficult to predict when or if this will happen, and it will likely require significant advancements in both technology and our understanding of the biological and psychological impacts of long-duration spaceflight.
How many years do you think it would take for humanities technology to advance enough, to the point where we are able to leave the solar system?
It's difficult to predict exactly how long it would take for humanity's technology to advance enough to enable us to leave the solar system. There are many factors that could influence the timeline, such as the level of investment in research and development, breakthroughs in materials science and propulsion technology, and the availability of resources.

Some experts believe that it could take centuries or even millennia to develop the necessary technologies for interstellar travel, while others are more optimistic and believe that significant progress could be made within the next few decades. However, it's important to keep in mind that predicting technological advancements is notoriously difficult, and it's impossible to know for certain how quickly progress will be made.
In your own words, can you explain the things humanity needs to do in order to progress to the point of interstellar travel? I understand that resources are a big issue; Also climate change, and other factors. 

After we've delt with our problems on earth. Should humanity first colonize our own solar system and terraform the planets within it; If so, how will humanity achieve that?