Oxford from the RFL website:
Cryer, Matthews, Gill, Burnett, McAllister, Holmes, Canterbury, Smith, Lee, Igbinedion, Baird, Hoggins, Brooker, Evans, Decaro, Greene, Flintham, Withington, Siddons

So that's probably:
Jim Cryer, Andy Matthews, Kieran Gill, Harvey Burnett, Clark McAllister, Tom Holmes, Casey Canterbury, Jack Smith, Jack Lee, Dan Igbinedion, JJ Baird, Andy Hoggins, Marcus Brooker, Luke Evans, Santino Decaro, Charlie Greene, Adam Flintham, Adam Withington, Jordan Siddons

Compared to last week:
In - Jack Lee, Dan Igbinedion, Luke Evans, Santino Decaro, Charlie Greene, Jordan Siddons
Out - Joshua Nathaniel, Nathan Kitson, Danny Allan, Will Maher, Sadiq Adebiyi, Joel Thomas

Good to see Luke Evans back from injury.
Jordan Siddons is a prop from Lock Lane (played at 10 in the game at Maidenhead). He does have a brother Chris who is also a forward at Lock Lane.
Not sure about Lee but could be Jack Lee from Fryston and previously Keighley who plays at hooker (not to be confused with the hooker Jack Lee from Hunslet who played against Oxford last weekend).

Dual reg - Kieran Gill, Tom Holmes (both Castleford)


Toulouse - Kheirallah, Maurel, White, Ford, Gonzalez-Trique, Boyer, K Bentley, Masselot, Planas, Curran, Kriouache, Puech, Canet, Marion, Hepi, Hulme, Marguerite, Marcon, Sangare

So no place for former Oxford player Andrew Bentley.

I've not seen a starting line-up yet, but "Lee" will in fact be Scott Lee, who has joined on a month's loan from Keighley. A utility player, including at hooker.