The tube, tire levers, and patch kit you can get anywhere because they're all pretty much the game. Make sure you get the right size tube and get the patches with glue rather than the sticker ones because they work better. I like Topeak's Morph pumps because they get air in fast and the little foot lever thing to stand on makes them super easy to use, but everyone seems to have a different favorite pump, and since I've never used that one you're showing, it could be fantastic for all I know. The Mountain Morph (my pump of choice) is a huge beast of a pump anyway, though that's probably why it pumps tires up so fast. Multitools are great. For big at home repairs, it's nice to have a set of allen wrenches, but they're handy on the trail. As long as it has enough allens, a flat, a phillips, and a chainbreaker, you're probably fine. I like the CrankBrothers tool, but I've heard it rusts easily in humid climates. If I had money to blow, I'd buy an Alien. The tool you have pictured is more than likely fine, though I might buy a cheap chainbreaker separately. Don't worry about the seat pack. Get a Camelbak instead.

Other stuff you may want to pick up:
Floor pump (the mini pump is great on the trail...but in the garage you want a floor pump)
Chain lube (get something appropriate for the trail conditions you'll be riding)
Pedal wrench (I use this all the time because I play musical pedals with my platforms and clipless. YMMV though, other people might never touch it)
Spoke wrench (Nice to have, though ask your bike shop to show you how to use it, else you may be in for some frustration)
Spare derailleur hanger (At some point, you WILL need this one)
Extra chain links (Nice to have and not that expensive)

Probably other stuff that I'm not thinking of...as you use the bike, you'll figure out what you need.