<is sealant needed on the push rod tube seals?>

No.

<also crank case bolts 13lbs and studs 20lbs
which are the studs?>

A "bolt" has a hexagon at one end, and a "stud" is threaded at both ends.

<also any idea on torque setting for timing pinion nuts?>

Tight.

and base nut washers, only on the outside nuts or all round?

If the inner nuts are the correct 12-point type then they don't require washers.

<how am I ment to get a torque wrench settng on those base nuts?>

With great difficulty-unless you want to go hunting around for torque wrench offset extensions to fit the nuts. Simply do them up tight.
Or, if you want to get scientific, then you could use a lever and spring balance to torque up the nuts in which case you would need to work out the "pull" poundage required for the particular length of lever/spanner.