As long as all the purchases are done with your Apple ID, you should be able to sync it to your new computer and re-download (for free) all of your purchases, both free and paid.
Hope this helps.
I dont have any purchases from itunes as the ipad would not sync with 10.4 it just contains stuff on the home screen we have saved i.e facebook,games,online papers and pictures downloaded from the camera via usb camera kit,will it wipe all these things when i sync with the new pc?
Sync Your iOS Device with a New Computer Without Losing Data
Syncing to a "New" Computer or replacing a "crashed" Hard Drive