Im doing research first before making an actual test (then serious transactions) with regards to paper wallets. I have done research on youtube but what I am getting is mostly "how to make paper wallets" or "how to import private keys (of bitcoin wallet) to blockhain.info".

Other than that I still have questions and even here I can't find a thread that closely matches my expectations so I will make my own questions..

Bitcoin paper wallet first:

I have watch a tutorial how to import private keys to blockchain.info and base on the video the transaction was a success. But----

assuming that my private key has a pass phrase

B1. Can I reuse that wallet? even the private keys has already touches the internet... (what I mean for reuse is: the public address is a donation address, or even its not I just don't want to make another one)
base on your replies then I will decide if what method should I use

B2. My p-wallet contains 2 BTC, is possible to just take 1 BTC and the wallet will still have a ballance of 1 BTC?

B3. other than blockchain.info what other website can you recommend (legit) for importing private keys of papaer wallets?

B4. Is there a transaction fee upon importing private keys? if there is, is it automatically deducted from my current ballance?

Altcoins:

I'm guessing that the procedures for p-wallets are the same

A1. Bitcoin has blockchain.info, Where can I import private keys for

-> ethereum
-> dashcoin
-> litecoin
-> monero
-> dogecoin