OH2CA,
There are tons of shopping centers that include both a grocery store and some shops and a coffee establishment.. Many are walkable distances from homes. BUT most people probably drive there, then walk around. You will see lots of people going for walks, just around their neighborhood, walking their dogs, etc. I dont see too many people walking to the grocery store, etc. That doesn't mean they dont do that, but I just dont notice it.
As far as a 'hang out sort of places', those might be more limited, but there are still many strip malls around town that people like to sit and relax and mingle with others...
Janss Mall is nice, its an outside mall with restaurants, shopping (some larger storesand some smaller), coffee places, movie theaters.. Its on Moorpark Road close to the 101 Freeway
Closer to the 101 freeway, Moorpark Road at Thousand Oaks Blvd. they have a nice little strip mall with Starbucks, Jamba Juice, Pier One, Tillys.. Lots of people like to go sit outside and relax with their 'drinks'. There are other things nearby, within walking distance - Borders Books Store, a golf store, Longs Drugs, a nursery...
Newbury park has a nice area that my family calls 'The Food Court'. They have several quick food sorts of restaurants, a sit down restaurant (Islands), Starbucks, Jamba Juice, couple small shops. Walk a little and you'll be at Target and Home Depot. This one is located right off the 101 at Wendy.
Another in Newbury Park is off Reino Road and Kimber. They have an Albertsons, Starbucks, Longs Drugs, a nice Hallmark store, and several small places to eat (Subway, Chinese food, Carls Jr, Pizza Hut...)
At Westlake Blvd & Thousand Oaks Blvd, 3 of the corners have large shopping/restaurant centers. AND along thousand Oaks Blvd going towards Thousand Oaks there are TONS of places, too!!!!
The Lakes on Thousand Oaks Blvd (near the Civic Arts Plaza) is a nice place to hang out. They have some nice restaurants and some upscale sort of shops, Coffee Bean, etc. They actually have some small ponds/lakes that you can sit and enjoy. Its a nice place to go.
I could go on and on...
Since you are not local, I guess it will be harder for you to 'get the feel' of the area. If you give us specific areas to 'describe' to you, I am sure we can do that

I have lived here in TO for about 30 years, I know the area pretty well.
I know people who work at CLU and they all say its a great place to work. It's a growing campus, lots of new construction and upgrades happening there. Good luck on getting the job!
I just thought of something. You are looking for apts., but maybe you could rent a condo in the Wildwood area, then you could actually WALK to work at CLU. It would be probably a 15 minute walk. Those condos are located at Lynn Road & Avenida de los Arboles. Just a fyi - Lynn Road turns into Olsen Rd right up there near CLU.
There are other condo/apt. areas right there next to CLU (Mountclef Apts - low income, govt subsidized - dont move there), but there are condos, I cant remember what they are called.. They are kind of nice. I want to say McAfee is the street. Might want to check into those, too. I dont know what they rent for, but they are small, so I cant imagine it would be too much more than an apt.
Let us know if you need any more info!