I just had a glance at the first one. The job description sounds like asking for a complete dev team including the backbone DBA staff. Not to forget the customer support being included as well as the hardware support.

Unlikely there are many people being qualified to meet all requirements...

Based on those requirements there are a lot more questions than answers. The main question is: what are the major tasks they're looking for?

All I can say is: give it a try, tell them what you know and what you don't know and try to figure out what they're really looking for.