I want to know how much ETH should i deposit (minimum) to myEtherwallet for transfer from the wallet to etherdelta?
0.01 ETH
How much ETH charge for 1 transaction in MEW?
It's not MEW that charges. They don't take anything. It's just transaction fees required by the network.
They're usually take no more than $0.26 to deposit into etherdelta.
Can i transfer all tokens to Etherdelta at once?
No, it's one at a time.
Just import the address to etherdelta and you do everything through the website directly. Depositing,withdrawing,selling,buying everything.
ED reliance on intelligent contracts, which is probably the most bright ETH floor applications.
Fees, it will not be expensive, usually 0.01 ETH can be used for a long time. Of course, you can set gewi lower, I set the fee low, but the arrival time is a bit slow.