Hello, please, how can i draw this nice pedestal with trickle out effect? Thank you very much for yours responses.

search for dripping paint images on the net
import in inkcape
turn the bitmap(s) into a vector using Path > Trace Bitmap
select the paint and the other shape where you want to add dripping paint
use Path/Union (or other boolean operation)

You want to draw that in Inkscape? Or you want to import it, and use it somehow?

After you draw it, there are some filters that can do something like that. Filters menu > Protrusions

I don't think filters work on rasters. So you'd have to make a vector drawing. Auto-tracing that image will probably take at least a few minutes, and result in a huge file. Might not be possible on an older computer (with less RAM).

It would take way too long to explain how to draw that from scratch. (Unless you wanted to hire a tutor.) I could explain how to manually trace it with the Pen/Bezier tool. But for a completely original drawing, it will be a learning curve for you, and take some time and practice, to get to know the tools.

Which tools? I'd say Pen/Bezier, primarily. Possibly you could help to simulate the skyscrapers with some grids, which can be made with a couple of different extensions. Or draw your own grids. Probably the Rectangle shape tool can be used to get most of the outlines. Use Envelope Deformation LPE or extension on the final draft, to make it sort of folded inwards. Then finally, one or 2 of the Protusion filters on various different parts.

There are already a lot of tutorials on the web for how to make splatters.

Here is one that uses the star tool:
https://www.youtube.com/watch?v=Zf9yBzuVoxQ

Basically a drip is a rectangle with a circle at the end. Add some nodes, maybe apply simplify or node editing and you have a very basic drip.

When it comes to tracing splatters, you can also make use of existing Gimp Splatter brushes, instead of searching images on the web.