Seven tools that´s i think are usefull or simply indispensable:

1º screwdriver set

 

this is a rely usefull tool i say usefull and no indispensable because you can work well with only a couple of screwdrivers but you must have one of two obtions.

 

2º soldering iron 

 

 

 this is one tool you must have if you want to wornk on electronics thats all i have to say.

3º Helping hands

 

 there´s a lot of  types of helping hands and you can get thats you like but this tool is realy useful but you can work witout it.

4ºTweezers

A realy helpfull tool and a loot of people probably say ``you must to have´´.

 

5º needlenose pilers

this is one of the tool you must have because all the time you ar bending the pins of the elements and you can use it like the Tweezers.

 

6ºClippers 

You must have one of those because all the components you goin to place on a PCB have the pins longer than you need and you must to cut it.

7ºwire strippers 

 

 This is a tool you realy don´t need because with one scissors can work wel but if you have to peel a lot of wires it can be usefull.