I wonder if a lot of these people installing PV kits in their homes are more interested in the "free money" from the power company than actually getting off the grid.
In a number of commercial cases my work dealt with, that is the exact reason. We actually had a large commercial customer spend a few hundred thousand on solar panels, and call us to hook them up to the electrical grid so that they could start being paid by the local utility. They had a great plan; if only they had consulted the local utility, local regulations, and were sold the proper control equipment... Of course, they contacted the local news to complain about how unfairly they were treated, for not following any protocols or engineering competency what so ever.
Second is the cost to hire an electrician to hook it up, do I need to ask to see some kind of license or bonding to insure they are capable to do the job????
It will vary significantly, on the where you live, but at a minimum it will
likely be a few hundred ($3-400) for a licensed and bonded electrician to install. Licensing, bonding/insurance, is an absolute requirement for your own protection as well as their professionalism.
NHSparky, is right, it's fairly simple for someone with an electrical background to install. However the regulations are different in every jurisdiction or municipality, and even insurance policies, in some cases you could be required to have an electrician install this. If you're looking at someone else to perform a small engine check up on the generator, I'd highly advise you to also have an electrician install this switch. Just a quick Google search, and I see some electrical outfits offering the transfer switch
with installation in the $500-1000 range.