Just a thought in nature any species is bound to become extinct with low genetic variability. This is seen recently in the dwindling Nay-Nay geese population of Hawaii. So just in question the human population was supposed to be started with a handful of about six people now how could those six people populate the earth without going extinct as the genetic variability would be immensly low probably even lower than the Nay-Nay? Just a question please support answer.

Another Question to evelove is to completely change ones species at least in history this is what evolution has meaned not adaptation. So when the first animals were formed how could they breed to survive? This is an immense hole in evolution as the probability that Many animals of the same species formed at the same time is so low that it might as well be zero. So for instance say a single colony of cells forms the very first plankton how could this breed and survive? I know about asexual reproduction in plants but in animals and especially in the formation of mammals this is almost non-existant.
Once again please support your answer.

Sympatric speciation.
http://en.wikipedia.org/wiki/Sympatric_speciation

Possibly other forms of speciation as well. It's not like monkeys had sex and voila a human was born. Rather, monkeys in an isolated area, started maneuvering, genetically, towards a niche, and eventually speciated, and became genetically incompatible with other species.

Extinction is not imminent given low genetic variation. Humans have less genetic variation than chimpanzees (http://www.rpi.edu/~eglash/eglash.di...mps/chimps.htm).
Where did you read that the human population was started with 6 people? The evolution of our species was very gradual. It is difficult to say where is "started".
You must keep in mind our capacity for intelligence and therefor our ability to circumvent traditional natural selection. Not that we no longer take part, it's that different things relating to intelligence are being selected for. (http://cat.inist.fr/?aModele=afficheN&cpsidt=2993518)
Our intelligence aside, humans have adapted mechanisms for increasing genetic variation in choosing a mate (http://www.nel.edu/23_4/NEL230402L02_Fink.htm)
The first protocell was probably unicellular and asexual. The DNA would have replicated itself. An early phospholipid bilayer would have formed in order to compartmentalize the cell, allowing for the development of the nucleotides constituting DNA and thus for the replication process itself (http://library.thinkquest.org/C00453..._of_cells.html). This is grossly simplistic but kind of introduces the idea.

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As was stated above, extinction is not inevitable if a population has low genetic variation; it is just more likely due to the lower likelihood of being able to cope with changes in the population's environment. Plus, deleterious genetic combinations become more likely with high levels of inbreeding between genetically similar individuals.

I also have never heard the 'humans started form 6 people' idea. I don't think any credible source supports this (if I am wrong please point me to one).

Also, your understanding of evolution is incorrect (not trying to be rude)- evolution is the gradual change over time of hereditable characteristics in a population. Species don't change from Species A on Monday to Species B on Tuesday. It is gradual over (for most species) long time periods. Evolution moves in a gradual line, not in a stair step function. All phases in between the old type and the new adaption need to be viable, or the evoluation would never occur (ie why it is believed humans have an appendix- it serves no purpose, but if it gets smaller it is more prone to clogging and causing health problems so does not grow smaller and eventually disappear).