Can you adjust the valves on an 1995 Corolla 1.8 if so what is the valve lash?

Yes you can adjust them. It's accomplished by using the correct thickness of shim. Valve clearances (engine cold) are 0.006-0.010" (six to ten thousandths) on the intake side, and 0.010-0.014" on the exhaust.

http://www.toyotanation.com/forum/130-7th-generation-1993-1997/409805-valve-lash-adjustment-specs-97-corolla.html