i will hane 20000 tech points soon which should i buy first medicine or culture

what do you have already?

second level of all except these 2

I have the same question. But i have all first lvl except for Engenering, Exploration, Farming. and have 20,000

They are both important.

Lvl 2 Medicine will keep your villagers healthier of course.

There is something you can do if you have lvl 2 of science tech and lvl 2 of culture tech. I won't say here because it is a spoiler but if you are desperate to know you can read about it in the detailed spoilers guide by LadyCFII here:

Detailed Spoilers Guide HyperLink

With those 3 left to do, I personally would do Farming then Engineering then Exploration.

Let me re-write this lol i messed up i have level two Farming, Engineering and Exploration. I dont have level two Culture, Science or Med.

I re-wrote it anyway lol got confused sry. But i think it would be best to do level two Science becuase then you get more stuff if you know wut i mean i dont know if thats a spoiler.

I would do the science first, so you can start accumulating tech points faster. For as to whether Medicine or Culture next.. if your villagers are getting sick and dying a lot, do medicine. if you want to do "something" (see note above) that requires lvl 2 culture and lvl 2 science, then do culture next and medicine last.

Thanks.