So if i only have .5 zcl I won't get any bitcoin private unless i get another .5 zcl before the 28th of feb?
yes, when hard fork happens, snapshot for all ZCL and BTC will happen. Anyone with a ZCL or BTC in a supported wallet or stock will get Bitcoin Private (BTCP) with a 1: 1 ratio. For example, if you have 5 ZCL and 0.1 BTC, you will receive 5.1 BTCP.
I'm sure that is incorrect. Even if you have .1 ZCL when the fork happens you still get .1 BTCP. You don't have to have a full coin to get BTCP. Same goes for BTC to get BTCP.
I do not know too, I just got the source from this
https://bitcointalk.org/index.php?topic=2675257.0 for more details you read

Bitcoin Private will be distributed on a 1:1 basis. This means, that for every 1 ZClassic (ZCL) or 1 Bitcoin (BTC) held during the snapshot, holders will receive 1 Bitcoin Private. For example, if someone holds 20.3 ZClassic and 1.5 Bitcoin, he/she will receive 21.8 Bitcoin Private.
As long as you got the keys you get the coins

..any amount will do
