There are two kinds of Zcash address - transparent and protected. Existing paper wallet generators will require a minor modification for fransparent addresses but my guess is that an entirely new approach would be needed to generate protected addresses.
A Zcash testnet block explorer has recently been made available - which is useful for verifying transparent address balances. Zcash testnet block explorer - #9 by Voluntary I’m not sure if the current full-node wallet software has the ability to derive a balance for protected addresses but it should by the time the mainnet starts.
I wouldn’t expect support from exchanges until a reasonable volume of zec has been mined.
Price will be up to buyers and sellers but, in my opinion, the signals they rely on at first are likely to be highly speculative.