-> i've several 12volt, 11Ah batteries here that i'm wanting to charge and load
-> test...
-> can i charge them with a standard car battery charger? what settings should i
-> use?

NO they are too small for charging on an Automobile Unit. Use a
motorcycle battery charger. 

-> what's the best way to load test them to see if they are still good?

Fully charge them and then put a 1 or 2 amp load and measure how long
before the terminal voltage drops below 10 volts. As an example 1 amp
for 10 hours would be 10 Ah. That would indicete a very good battery.
Iusualy think of replacing non-critical batteries when the Ah is about
1/2 of the Battery rating.

-> what does the 11Ah (Amp hours) really signify?        
                               
As stated about a rating of time vs Discharge current. With smaller
batteries ususaly discharging at 1/10 the Ah rating.
Whicy by the way is a good measure of a safe charging current. Thus your
11 Ah battereis should be charges at approx 1.1 Amps.

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