Options on stock manifold are limited. Rebuild the stock, have the stock upgraded, just buy an already upgraded ct26 like ATS ct27, ct"20b".. Other than that you will need an adapter. Depending on your supporting mods and what you will add when the turbo goes in will be the deciding factor on which adapter to get. Yes Mr2 Ct26 will fit. TD06 20g has been good to me and are failry cheap and easy to find. After market manifolds are available and most come setup with different flanges for different turbos.
SS oil line on stock turbo yes. They sale them on ebay and some other sites. MR2 version should work fine. I used one of the ebay feeds on my TD06 with the correct banjo bolt for it.
~James