Make the Mouse Body and Cloth.

Make the Body:

Click on box button and drag up to create the box in the Perspective view. In the Parameters, Set Width Segs to2, Height Segs to2.

Right-click on the box, choose ‘Convert to’, and select ‘convert to Editable Poly.’ In the top view, click Slice plane button, click Slice button to slice the box in the ‘Editable Geometry’. Then click vertex selection mote button and select all vertexes on the left of the box, then delete those.

Click Mirror button on the main toolbar, select X as the Mirror Axis and Instance Selection, and then click OK.

On the front view, modify the outline of the body. Select polygon in the bottom of the body, then click Face Extrude from Modifier List. Repeat it three times. The first time for make the legs and set the place. Second for make the shins, the last for make the position of the feet. After that, modify the shape by vertex.

Select two polygons in the front of the feet. Extrude the shape by Face Extrude. Click Vertex selection mote button to modify the shape.

Arm:
Select the shoulder on the perceptive view, click Slice button to add a loop of line on the shoulder of the ‘Slice Plan’ in the ‘Editable Geometry’.
Select the four polygons on the middle, click Face Extrude button to extrude twice for make upper arm and forearm

Hand:
Select two polygons on the front of forearm and click Face Extrude to extrude three times. Slice the arm by Slice and extrude these polygons to make the finger. Then modify by Vertex.

Tail:

Click on Cylinder button and drag up to create the cylinder in the Perspective view. In the Parameters, set Height Segs to5. Set the place on the left view. Right-click on the box, choose 'Convert to’, and select ‘convert to Editable Poly.’ Then modify the shape by Vertex. And select the Edge selection mode button, click Loop, modify the thickness by Select and Uniform Scale.

Cravat:

Click on box button and drag up to create the box in the Perspective view. In the Parameters, Set Width Segs to4, Height Segs to4. Right-click on the box, choose 'Convert to’, and select ‘convert to Editable Poly.’ Then modify the shape by Vertex.

Make the Cloth:

Select all polygons in the body and click the Move tool, shift-drag to clone the body.

Click the clones, enlarge it and modify by vertex on different view.

After that, right-click the body that was hided from cloth then choose Hide Selection and click Unhide All. Delete these polygons. Attach the cloth and body and Collapse them.

Make the Mouse Head.

Whole Face:

Click on box button and drag up to create the box in the Perspective view. In the Parameters, Set Width Segs to2, Height Segs to2.

Right-click on the box, choose ‘Convert to’, and select ‘convert to Editable Poly.’

In the top view, click Slice plane button, click Slice button to slice the box in the ‘Editable Geometry’. Then, right-click it, select ‘convert to Editable Poly’.

After that, in the left view, click the vertex selection mode button, hold down the Ctrl key and select on the left vertexes on the left of the box, then delete those.

Select the model, and click Mirror button on the Main Toolbar, select X as the Mirror Axis and Instance under Clone Selection, and then click OK.

Switch to left view and modify the width. Select vertexes and use the Move tool to pull out according the mouse face. Then move out the mouse nose and click Cut button to creating two new edges in the face.

Click the Polygon selection mode button, then polygon-select polygons being low the nose and extrude them a bit depth to outline the lip. Extrude twice again to make the inside the mouth.
After that, click Vertex selection mode button and select vertexes to move these to modify the shape.

 

Make the Eye socket & Mouth:

Click Cut button to creating new edges in the place of the mouse eye socket. Select the polygons and extrude them. Make the shape look like the mouse eye socket.

Select vertex to fine-tune the shape in the top view and left view.

Make the Mouth:

Click the Polygon selection mode button, then polygon-select polygons being low the nose and extrude them a bit depth to outline the lip. Extrude twice again to make the inside the mouth.

After that, click Vertex selection mode button and select vertexes to move these to modify the shape.

Make the Eyes, Ears and Nose:

Make the Eyes

Click on Sphere button and drag up to create the sphere in the Perspective view.

Switch on left view, align to eye socket, hold down the shift key and dray in the X axis to create a clone.

Make the Ears:

Select four polygons on the side of head extrude them to look like mouse ears.

Make the Nose:

Click on Sphere button and drag up to create the sphere in the Perspective view. Move it space to nose on the front view. Right-click on the box, choose ‘Convert to’, and select ‘convert to Editable Poly.’ Modify the shape by vertex.

Make the Tongue:

Click on box button and drag up to create the box in the Perspective view. Set Width Segs to5, Height Segs to5. Right-click on the box, choose ‘Convert to’, and select ‘convert to Editable Poly.’ On the top view, modify the shape by Vertex, on the left view to modify the depth in the same way. On the front view, put it in the right place.