Since you didn't provide a serial number, you will have to go to http://www.browning.com/customerservice/dategun/index.asp to look it up. The BPR 22 Rifle was made from 77-82. The BPR Pump Rifle was introduced in 1997.
No way to answer without a serial number.
By the serial number.
Winchester and Browning
This is a Browning .22 auto rifle made in 1968.
50- 2000 usd
50-600 usd
1984
100-1000 USD or so
Pre 1969. You will have to call Browning to narrow it down further.
Call Browning with the serial number.
SN doesn't follow Browning's convention. Call Browning to find out.
Browning.com has sn data on their web site under customer service.