It's odd that 'to' and 'too' are confused so much on line, as in "He went to far." It's very minor. It's just rum that it happens so much.
Crumble, we just enjoy language here. We like kicking the subject around. If you don't, that's all right too.

Interesting, Partial.
Perhaps it's a question of the distinction between a main verb and an auxiliary verb.
Chambers describes the latter as 'a verb that helps to form the mood, tense or voice of another verb'.
Verbs such 'have' and 'be' can be either main verbs or auxiliary verbs depending on the context. The 'will' in 'I will go' is an auxiliary verb and can be contracted but in the examples you have given, Partial, they are main verbs and can't be contracted.
Okay, shoot me down.

'I've no idea' is fine because there is no emphasis on 'have'.
'I've to go' doesn't work because you need emphasis on the 'have' to express an obligation.

Thank you for your post, Ramon. Non-native speakers can produce some surprising perspectives.

The vogue for pronounceable acronyms has swept the board. In the past, though, pronounceability was not necessary. Things change.

Yes Hairy, I'll have to teach my keyboard who's boss.
'Eventuate' is a good example of a fancy synonym but my point was rather that 'documentation' (for example) was a furnishing or application of the object itself, namely the document. The word 'documentation' was then mistaken for a high-toned alternative to 'document'.

As to pointless fancy-pants words like 'eventuate', don't get me started.

There I go again with the spelling mistake. Time for me to shut up for a while.

Everyone says 'usage' to mean 'use' but that doesn't mean I have to like it. Why leakage? What's wrong with leak?
Maybe I've returned to me nonage.

Signs Signage....Nice one, Hairy.

Sound 'off', blast it. Why does one always make a spelling mistake when laying down the law on English?

"I dove my hat" is not English. It's 'doffed'.

I believe that 'don' is a contraction of 'do on' and 'doff' is a contraction of 'do off'.