Yes, that sentence is wrong, the verb "need" should be followed by "to" in this case.

"Need" has different usages: 1) to require sth./sb. because they are essential, not just because you would like to have them Here are the examples: Do you need any help? It's here if you need it. 2) used to show what you should or have to do, and here it is used with "to": All you need to do is to complete this form. In 1) "need" is used as modal verb (or modal auxiliary verb), but in "need to" it's a vt.. :)

yes, you should use it Thiago

I need to talk to you is the correct way. The infinitive "to talk" is needed after the first verb