I recommend a multimeter for a start. A $10 yellow multimeter should be fine. Also make sure you don't forget the leads on the 10A setting. The soldering iron might be fine, depending on how much you use it. Not much point buying a good iron if you're just learning to solder. (imo) I am not sure what else is needed for this particular kit, but a good pair of pliers (small ones) and side cutters are the tools I use the most (and nail scissors for component legs). If you buy the iron don't forget solder and soldering paste.