Comments on some specific pieces:
- Corded Power Drill
Skip the corded. Yes, a corded power drill has more power, but cordless (e.g., ~ 18V) is plenty powerful enough for amateurs and many pros, and far more convenient. Modern cordless batteries last a long time, charge quickly and don't lost torque/speed as much with a low battery (until it gets really low) like the old batteries did. Plus if you get a reasonable brand you get a battery that can be shared with other tools (from the same brand, of course). I would avoid the 12V (or lower) tools - they tend to be underpowered and you don't save that much these days. But beyond that, most brands will work just fine.
- Corded Circular Saw
Good idea. Corded is less of an issue here as (a) for most people the saw will be used less frequently than a drill and (b) the extra power of corded can really make the difference in usability.
- 100' heavy duty Extension Cord
Absolutely! Consider one with a lighted socket so that you can easily see if it is plugged in.
- Level
Get a long one, and I recommend a metal frame for durability.
- Crow Bar
Definitely!
I bought a crow bar many years ago. Hadn't even used it but threw it in a suitcase with other tools on a trip to a customer in another state where I had to do (among other things) some network cabling. Sure enough, I had a problem getting wires through the attic and the crow bar solved the problem.
I would add in:
Pipe wrench
Basic electrical tools - multimeter, receptacle tester, non-contact tester.