I was going to order new brake pad sensors and was asked if they were sprint type or wedge.Anybody know the answer. Also is there one per wheel or one for front and one for rear?

 

If you told them the make/model and they had to ask you probably shouldn't be buying from them. Only one side has the sensor I guess on the assumption that the fronts wear more or less the same as do the rears.

 

Do a search for these part numbers:

Front: C2P12722 (maybe described as wedge or clip on?)
Rear: C2D2976 (maybe described as spring as it sits in the spring?)

Only one of each required.

These are from my service parts list for the 5.0 XKR. I believe these are the same for many Jaguars and they gets your search started if they are not exactly the same.