There are three ways of connecting two verbs together.

1. A modal verb followed by a bare infinitive:

I must go

I can go

2. A verb followed by to + infinitive:

I want to go

I need to go

3. A verb followed by a gerund:

I enjoy going

I recommend going

As you can see,  verb + to + ..ing is not an option.

The examples you give above are not verb+verb combinations, but phrases involving preposition use.

Prepositions - at, from, with, by - are always followed by a either noun or a gerund, (..ing) the noun form of a verb. The word 'to' does not belong to the verb which follows it, but rather to the phrase which precedes it. 

There is no obstacle to [the registration of the company] =  obstacle to + noun phrase

There is no obstacle to [registering] [the company]  = obstacle to + gerund + noun phrase

Likewise, the phrase 'to commit oneself to' needs to be followed either by a noun ( 'the purchase of shares) or a gerund ( 'purchasing shares').

Other very common phrases with 'to' which work in this way are 'look forward to' and 'be used to'

e.g.  I'm looking forward to the party.  (noun)

       I'm looking forward to seeing you (gerund).

"To" + verb + "-ing" is not a specific verb form. What you have here are, on the one hand, phrases containing the preposition "to" ("There is no obstacle to...", "...committing yourself to..."), and, on the other hand, the gerund of the verb used in a nominal sense (i.e. used as a noun). The "to" and the "-ing" form of the verb just happen to come together.

This can be illustrated by using these in different sentences:

"There is no obstacle to the expansion of the company."

"Registering the company is a straightforward task."

"I do not recommend committing yourself to such a dangerous undertaking."

"Purchasing the shares would be sheer folly."

Thank you very much.