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@DrAzzy
I would skip the transistor kit.
What does it have in it? Obsolete BJTs? non-logic-level MOSFETs? That's my betting - parts that might be useful for repairs, but unlikely to be the sort of thing you'd want to use in a new design.
I'm with Gordon - all you need for transistors is a good MOSFET (logic level 2.5v), maybe a complimentary PFET...
The ULN2003 (which is kinda crap at low voltages) is sometimes handy, and has built-in base resistors - but I've never seen anything else that had built-in resistors. I'd rather not have them most of the time, because they may not always be appropriate, and artificially limit the utility of the part.