I recommend a Winegard HD7082P antenna aimed at about 83 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
As always attics Are Not a reception friendly environment and Never Will be a reception friendly environment.
Yes it is Ok to start with the HD7082P antenna in the attic.
If WOCK-CD VHF channel 4 ,
http://en.wikipedia.org/wiki/WOCK-CD ,
http://americaone.com , is not received and you will like to receive it then move the antenna to above the roof.
Here are some roof antenna mounts that do not make holes in the roof.
http://www.ronard.com/34424560.html use the 4560 mount ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
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A preamplifier is not required.
For 1 Tv connected use no splitter.
For 2 Tv's connected use a common simple 2 way splitter.
For 3 tv's connected use a common simple 3 way splitter.
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Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.com.
As always , trees and tree leaves do a real fine job of reducing or blocking Tv reception and so do buildings and other obstructions including the house.
It is best to install a antenna at a location that has the least amount to no amount of obstructions of any type or kind in the directions of reception including the house.
The Tv/s Must Channel Scan for the Digital Broadcast Tv Channels , sometimes named the 'Air Channels' or 'Antenna Channels' in the Tv setup menu because the Tv transmissions travel through the air from the transmitting antenna to the receiving antenna.
DO NOT channel scan for cable tv channels.