2hottay: "Needed essentials. . .", kind of repetitiously redundant by repeating yourself - if it's "essential", it's probably "needed". "Your b-day is coming up in a week or two. . ." - geez, you can't remember your birthday?
Timeless: "I say a frame pump", and nobody knows where on the frame you attach the damn thing. . . I think you mean "shock-pump".
Okay, okay. . . I apologize for being a wise-ass. . .jus' having a little fun. C'mon, we're all mountain bikers on this forum; if we can't laugh at ourselves, we might as well be "roadies" ("oh no, you didn't just go there. . .")
First, you can differentiate the two tube types by their valves. A "Schrader-valve" is the same as the valve-stem on your car-tires. . . the other ("Presta-valve") is not like the one on your car-tires. (That's the easiest way I can describe the difference. . .)
Second, your g/f is looking to buy you some goodies. . . stoked! Most girls love clothes shopping - tell her your waist size and tell her you'd like riding-shorts - let her know if you dig on "baggies" or "lycras". Maybe throw the hint that a jersey would be cool too. . . you'll quickly discover that cotton isn't the best choice for dissipation of heat (sweat).
A "hydration pack" is invaluable. . . Camelback's "MULE" is probably the best - 100oz water capacity and plenty room for. . . mini-pump, shock-pump, mini-tool (not a bad idea to check it for an 8mm hex just in case your crank-arm bolts loosen and a torx T25 for your rotors), definitely a chain-tool, couple of spare tubes and a patch-kit, maybe some spare links of chain, couple of zip-ties, and last, but not least, mountain-money (known commonly as toilet-paper).
. . .hope this helps! Boy, you see, start out as a wise-ass and end up writing a short story. . . .:skep: