How many electrons can s,p,d,f hold?

S holds 2 electrons

P holds 6 electrons

D holds 10 electrons

F holds 14 electrons

Shapes of s and p orbitals.

It should be noted, however that all orbitals hold a maximum of two electrons, regardless of type. It's not that d or f orbitals are any different than s-orbital in this regard - there are just more of them.