The conventional values would be
Volume pot: 500k audio
Tone pot: 500k audio
Tone cap: 0.022uf or microfarad (the equivalent to 22nf - nanofarad or 22000pf - picofarad, sometimes labelled as "223" with the "3" standing for three zeros, i.e. 223 = 22000pf).
There are no significant voltages inside an electric guitar so the voltage rating of the cap is not critical.
Cheers Stephan