Technically, dendritic cells are able to produce all the cytokines you listed, however which cytokines are made and how much of them, depends largely on the type of stimulation. At baseline (no stim), DCs will release only small amounts of cytokine, although spontaneous cytokine production does occur, especially in the setting of disease. All the proinflammatory cytokines you are interested in (IL-6, IL-1b, IL-12 and TNF) will be produced by DC stimulation with LPS, an activator of TLR4 which is expressed by DCs. There are also other activators of DCs, including PolyI:C (a synthetic mimic of viral RNA, acting via TLR3) and R-848, activating TLR8, which you can test. DC stimulation with R-848 for instance has been shown to increase TNF production. The regulatory cytokines IL-10 and TGFb have also been shown to be released by DCs, IL-10 is induced by LPS. I am not sure however that you will detect much of TGFb with these standard type of stimulations. TGFb has been described to be produced by DCs in co-culture with cancer cells as a possible tumor evasion mechanism. I attached a few papers for you which give you some insight in cytokine production by DCs and the required conditions.